Gentle giant Barney Emerald is drugged and robbed while on holiday in Pattaya. He befriends two Thai siblings, one of which is a muay-thai kick-boxing champion, and stays with them until he can recover his passport. Unfortunately the hunt for his passport makes him cross ways with international gangsters. But Barney has found a secret weapon, the very spicy Thai salad Somtum.
Chanachol, recently returned to Thailand after living overseas, signs up for a tour to get back in touch with Thai culture, and finds himself attracted to the tour guide, Mekhala. There are several problems with the relationship: Chanachol is married, with family, and Mekhala has a mysterious, symbiotic relationship with a deadly cobra, and many of her previous suitors have ended up dead.
Nida is a single mother who takes care of her anti-social son who has locked himself in his room for five years. The only way to communicate with her son is to write on a piece of paper and slip it under the door. But, when outsiders start to get curious about what is going on behind the door of her son's room, a series of terrible events starts to happen.
