Tah Tien is ostensibly a retelling of an old Thai folk tale about a battle between two giants, Yak Wat Jaeng and Yak Wat Pho.

Seeking vengeance, a man is directed by a sorcerer to cut his child out of his pregnant wife so he can create a miraculous 'ghost child'. Overhearing this conversation, his wife flees into the forest where she ends up giving birth to twins with the help of a kindly woman living there. Afraid her husband is chasing her, the wife flees further into the forest with just one of her children, but dies when she falls off a cliff after being chased by wolves. The wolves raise the child as one of their own, whilst her twin sister is raised by the kindly woman living in the forest.

A giant crocodile wanders around a Thai village and devours its residents.

Mit, a hotel manager in Chiang Mai, is going to Krabi to attend a wedding during Songkran festival. On the way, his car has an accident, so he has to hire Bang-ern, a bus owner to drive him to Krabi. The bus is tumbledown and Mit has no better choice, he is forced to take this bus. While driving to Krabi, they experience many troubles and later become new buddies who make chaos in Songkran festival.

A misguided youth falls into the bad company of an underground brothel syndicate but redeems himself on discovering that his mother was murdered by the syndicate's female boss.