The mad biology student Henry Degowski has bred a cross between a human and an insect in his basement laboratory. He lovingly raises it with human flesh. But the full-grown mutant gets out of his control. This calls Lieutenant Frank Steele of the Houston Police Department to the scene.

A writer is writing his latest work. Suddenly, a strange man appears in his apartment and brutally stabs him to death. On his way out of the house, the obviously deranged killer kills other residents...

The author Stefan König has writer's block. This changes when he witnesses the murder of a prostitute. He doesn't alert the police because he sets out to hunt down the murderer himself. The closer he gets to the killer, the more crimes he observes, which provides him with endless ideas for his texts. But the killer is very close...