Out of the blue, harmless citizens suddenly fall upon their fellow men and brutally slaughter them. The authorities are puzzled. Only Fritjoff Dumpf, a trainee on local private television, uncovers the mystery and takes up the fight against evil

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.