Half man, half monkey, Chad was born in a lab and kept hidden from the world. A journalist, investigating a macabre mass-murder, discovers the mutant boy — a creature with the mind of a child and superhuman strength. But the reporter finds out the hard way that nothing, and nobody, can stand in the way of progress. (Re-titled for its American VHS release, "Monkey Boy" is an abbreviated film version of Lawrence Gordon Clark's 1991 mini-series "Chimera".)

A freak lived his entire lifetime closed down in a cellar far in the country. But one day the Monkey Boy, after the death of his "keeper", an old lonely woman, is forced to explore the world outside. The story is set during one night only, a short time to discover the world, but enough time to find Agata, an autistic young girl, the only creature that seems to be able to communicate with him in that dark night full of weird lonely and unhappy characters called human beings.

A journalist investigates the death of his girlfriend at a fertility clinic where she worked and uncovers a plot to create a new breed of human based on crossing the genetics of man and ape.