Sutin, a teenage rock musician, masturbates gleefully, and often. Way too often. One night, flying sperm escape and impregnate local women. The babies grow into an army of little creatures with the teen's head -- and libido. Not only do the nasty little monsters think only of chicks and jerking off, they also have a distressing tendency to die at the moment of ejaculation. The city really starts to panic when aliens accidentally turn one of the spawn into a giant.
While animal hunting, Wittaya and Lokrai inadvertently offend Nang Takien, the guardian spirit of the forest, who then kills Lokrai. Wittaya is forced to take care of his friend's son, Kham Thong. As a young man, Kham Thong falls in love with Wittaya's daughter Porn but Wittaya prefers Trai, a civil engineer who came to their village to coordinate the building of a dam. When the dam was completed, the village flooded and Wittaya was tasked with clearing every tree, including a big Takien tree.