In a rural village west of Bangkok, Mak (Winai Kraibutr) is conscripted and sent to fight in the Siamese-Vietnamese War (1831–1834). He has to leave behind his pregnant teenage wife, Nak (Intira Jaroenpura). Mak is wounded and barely survives. He eventually returns home to his beloved wife and their child.

A friend visits and sees Mak living with Nak. The villagers, knowing she had died months earlier, realize Mak is spellbound by her ghost. But those who attempt to tell him are killed in the night by Nak's ghost, who is desperate to stay with her husband. When Mak confronts Nak about the rumors, she lies and says the villagers disliked her after he left for the war. She claims they are also telling lies about their son not being Mak's. Mak believes her and lashes out at anyone who tells him she is dead.

Mak eventually discovers the truth. Crawling under their house one night to retrieve an item, he trips on something sticking up from the dirt. Curious, he digs it up and finds a corpse making him wonder why Nak would always prevent him from going down there. Looking up through the creaks of the wood floor, he sees Nak sitting and brushing her hair. Dropping the comb through a crack, her arm eerily extends all the way to the ground to retrieve it. Mak covers his mouth to stifle a scream and continues observing Nak. Nak picks up her crying baby, who Mak realises is a corpse as well. A series of flashbacks reveal that Nak had a difficult childbirth and both mother and child died from complications. Mak flees in terror to the local temple to hide. Nak follows him and attempts to win him back, but he is too frightened of her. The villagers attempt to drive out Nak, burning down her house and at last summoning an exorcist. Nak refuses to leave unless Mak returns to her. Mak pleads with her to leave to the netherworld. He loves her, but they can't be together since she is dead. He tells her that he is going to cut his hair and become a monk in order to pray for her sins and allow her spirit to find peace. She still refuses.

The kingdom's most respected Buddhist monk, Somdej Toh, intervenes and, in a tearful farewell, Nak repents, leaving her husband for this life. The monk has the centre of her forehead cut out, thus releasing her spirit, and makes a girdle brooch of it. The epilogue states it later came into the possession of Prince Chumbhorn Ketudomsak. It was thereafter handed down for generations, with its current owner unknown.

Shrine to Mae Nak at Wat Mahabut, Sukhumvit Soi 77, Suan Luang District, Bangkok

The allegedly true story of Mae Nak Phra Khanong is Thailand's most popular ghost tale.[1] A popular shrine dedicated to her at is at On Nut, Sukhumvit Soi 77 in Bangkok's Suan Luang (formerly Phra Khanong) District.

The old tale has been depicted on film many times since the silent era, one of the most famous being Mae Nak Pra Kanong in 1958. British filmmaker Mark Duffeld directed a version in 2005 called Ghost of Mae Nak. There also is an opera, Mae Nak, by Thai composer Somtow Sucharitkul. 

Another retelling of the Nak legend is Pee Mak Phrakanong (2013), a film directed by Banjong Pisanthanakun, which relates the story from the husband's viewpoint. The film surpassed one billion baht in box office revenue, Thailand's highest grossing film to date.

[Source: Wikipedia]

After a friends' party, Jane (Natthaweeranuch Thongmee) and her photographer boyfriend Tun (Ananda Everingham) get into a car accident, with Jane accidentally running over a woman. Tun prohibits her from getting out of the car; they drive away, leaving the girl on the road.

Tun begins to discover mysterious white shadows and faces in his photographs. Jane thinks these images may be the ghost of the girl they hit. Tun, who has been experiencing severe neck pains since the accident, visits a specialist and is dismayed to find that his weight is double his regular weight. He dismisses the idea of being haunted, though his friends are also being disturbed by this entity.

Jane discovers that the girl was Natre, a shy young woman who had attended the same college as Tun. Tun admits that he and Natre were in a relationship, which Tun had kept secret from his friends. Natre loved Tun and threatened to commit suicide when he broke off the relationship. Tun witnesses his friend, Tonn, committing suicide, and discovers that his two other close friends from college have also committed suicide. Believing that they have been coerced into doing so by Natre's ghost, Tun becomes convinced he will be next.

Tun and Jane visit Natre's mother and discover Natre's decaying body in the bedroom. Natre had committed suicide, but her mother could not bear to have her cremated. They convince her mother to have a proper funeral for her, after which Jane hopes that everything will return to normal. They spend the night at a hotel, where Tun is confronted by Natre's ghost. While trying to get away, he falls off a fire escape and is injured.

On returning to Bangkok, Jane collects some photographs. One of the films shows a series of images of Natre crawling towards the bookcase in Tun's apartment. Jane finds a set of negatives hidden behind the bookcase. She develops them to find photographs in which Tun's friends—the ones who committed suicide—are sexually assaulting Natre. Disgusted by her findings and now convinced that Natre tried to warn her, a teary Jane confronts Tun. Tun admits that he witnessed the rape but did nothing to stop his friends, and that he was the one who had taken those photos. He says he did it out of peer pressure and has never forgiven himself but Jane leaves him.

Knowing he is still haunted by Natre, Tun begins taking pictures of every room in the house, but does not see her. He throws the camera in a rage, only for it to go off and take a photograph of Tun, showing Natre sitting on his shoulders and revealing the true cause for his neck pain and double body weight. Natre covers his eyes, making him lose balance and fall out of the window.

The final scene shows Tun bandaged and slumped over, sitting on a hospital bed while Jane visits him. As the door swings closed, the glass reflection shows Natre still sitting on his shoulders.

[source: Wikepedia]

The story is set in mid-19th century Siam, during the era of King Mongkut and at the height of the Rattanakosin Dynasty, when Siam was plagued with wars with its neighboring kingdoms. Mak (Mario Maurer) was drafted to serve in a war, forcing him to leave behind his pregnant wife Nak (Davika Hoorne) at the town of Phra Khanong, not far from Central Bangkok. He was wounded during a battle and sent to a medical camp, where he met fellow soldiers Ter, Puak, Shin and Aey, who later became his best friends after he had saved them from certain death.

Meanwhile, in Phra Khanong, Nak struggled alone painfully to give birth to the baby; she calls out for help, but she is too weak to be heard. Shortly after, rumors started circulating the village that Nak had died in labor and was now a ghost of a very powerful form haunting the house. The villagers in the neighborhood then heard her singing lullabies to her baby, terrifying them and forcing them to cower in fear.

When Mak and his friends arrive back in Phra Khanong in the evening, they find the town completely silent. The five soon arrive at Mak and Nak's house during the night, and Mak introduces Nak to them. As it is now too dark to continue traveling, Mak's friends decide to stay.

The following day, the men visit the village market but are shunned by the fearful community who refuses to sell their goods to Mak and runs away. A drunk villager attempts to shout out a warning to Mak but is forced down and hushed by her son. Mak's four friends then discuss what they had heard, but dismiss the rumors as ridiculous.

Shin, however, while he was sent to fetch Mak, saw that the house was a dilapidated wreck that hadn't been maintained for months as one of the stairs broke, that the baby cot that Mak and Nak's son, Dang, was supposed to be sleeping in, was rocking by itself, and then he saw Nak extending her arm to an unnatural length to retrieve a dropped lime under the house.

The following day, Ter accuses Shin of being delusional, however, while taking a dump in the forest, Ter discovers a decomposed corpse behind the house wearing exactly the same ring as Nak. The drunk villager who had also tried to warn them earlier also turned up mysteriously drowned.

Mak invites his four friends up to eat supper, in which they are given leaves and worm made by Nak. They later play charades. One of them involve a wordplay "Phi Sua" lit: "Butterfly", that requires Nak to be described as a ghost "Phi." Mak then dismisses all of their warnings, proclaims that they are no longer his friends, and kicks them out of their accommodations.

Later, Mak and Nak go out on a date in the town, visiting an amusement park. Mak's friends attempt to convince Mak that Nak is a ghost at the ferris wheel, but they and the waiting queue were chased away by Nak. They attempt the second time by capturing Mak while they were in the haunted house. This time, they were successful and capture Mak into the forest.

Suddenly, in the forest, Mak's old wartime wound reopens. His friends express surprise at how slowly it has healed, but Shin and Ter become convinced that he, not Nak, is the ghost, and their fears are seemingly confirmed when Mak reacts in pain when they attack him with holy rice. The friends then flee from their wounded friend and rescue Nak since Phueak desires Nak's beauty.

While escaping in a boat, Mak 'returns' to them, walking into the river to them, but ends up almost drowning when he suffers cramps. As ghosts are not supposed to feel cramps, Mak is revealed to not have been a ghost, and he is rescued. When asked why he screamed when hit by the holy rice, he reveals that the rice had riddled his wound, making him yell out in pain. In the following confusion in which they don't know if either Mak or Nak are ghosts or not, Aey drops a ring identical to the one Mak, Nak, and the body behind the house had been wearing. Aey is immediately pronounced a ghost and kicked off the boat. The others then try to escape, but, as they had lost the paddles to the boat earlier, they cannot move. Nak then somehow produces a soaking wet paddle and hands it to Ter, who suddenly recalls that all of them had been thrown overboard, and had already drifted too far away for a normal person to recover. Ter then stands up on the boat to look between his legs at the group; Nak is revealed to have been the ghost all along as she has extended her arm to place on Mak's shoulder. The four remaining men, including Mak, retreat to a temple. Mak at first doesn't want to leave Nak alone but his friends knock Mak unconscious, the carry him to the temple.

There, the men come under the protection of the local monk, armed with holy rice, holy water, and the temple is fortified with an enchanted 'safety ring.' Nak quickly appears, in her terrifying ghostly form, and attacks. Initially, the holy 'weapons' successfully keep Nak at bay, but, in a panic, coupled with Mak's struggle to get back to his wife, all of the holy rice and water are wasted, and the monk was accidentally kicked out of the "safety ring." The monk then fled the temple, leaving the four, who had since destroyed the 'safety ring' while trying to run, to face the angry Nak. A pale Aey then reappears, and it was revealed that he is also human; he was in possession of the ring because he had stolen it off of the corpse behind the house to finance his gambling. With that topic settled, they finally remember that they were supposed to flee from Nak. Nak angrily shouted at the five that she just wanted to be with her loved one, which the four friends argued against since they didn't believe the living can be with the dead, and accuse her of killing the drunk; Nak furiously denies her involvement and says that the drunk had drowned herself. Nak, in a combination of sadness, anger, and desperation, then threatens to kill Mak and take him to live with her, but stops when she sees how much she had been scaring her husband. Mak then revealed he knew the truth about Nak all along, having had his suspicions raised during the game of charades. He had already looked at Nak between his legs, which revealed her ghostly form, and found her decomposed corpse. However, even then, he is far more afraid of living without her than of her being dead. The two tearfully reconcile. His friends, seeing them reuniting, also tearfully reaffirm their friendship, and vow to never leave each other again, even if one of them dies. A flashback to Mak and Nak's first meeting is shown.

In the credit scenes, Mak, his wife and now his four friends live happily in the village. Nak uses her supernatural abilities to do chores, play charades (and helping Mak win for the first time), scare off villagers attempting to drive her away (who are led by the village drunk's son) and even run the town's 'haunted house' attraction. It is also revealed that her child, Dang, also possesses some of her abilities, even though he is still an infant. 

[source: Wikipedia]