Thongsook is a shy, nerdy, childlike teenager who's always harassed and made fun of by his friends since he was a boy. Luckily Thongsook has a best friend in Nam, a girl who's grown up with him and looks after him whenever she can. When Thongsook and Nam enter college, they hang out with a new group of friends: Boy, Jack, Beam and Pui. As usual, these new friends enjoy making fun of Thongsook, a fate that the young man has to endure with hardly a protest. But one long weekend during school break, these bullies will experience something so terrifying that will forever change their idea about Thongsook. The whole gang take a trip to a deserted island in the middle of a lake but Thongsook is not invited despite Nam's insistence. However, once they arrive at the island, Thongsook shows up mysteriously. The pleasant vacation turns horribly wrong on the second night - it is Friday the 13th, known as The Night of the Devouring Ghosts.
