A deeply disturbed and epileptic young man benignly decides to murder other members of his dysfunctional family for altruistic reasons.
Several people disappear from and at the sea. Their bodies are found gnawed to the skeleton, even the marrow is missing. The scientists have no idea which animal could do such things. Dr. Turner begins to suspect that the company which builds a tunnel beneath the bay might have poisoned the environment and caused an octopus to mutate to giant dimensions...
An American journalist in Prague searches for his girlfriend who has suddenly disappeared.
