Experiment #151

When Tommy was a boy, he saw his grandpa, the leader of a vicious satanic cult, murder his father in a brutal ritual on Halloween night. Now he is 18, and grandpa is ready to indoctrinate him into the ways of the black arts.

A drug-treated schizophrenic plagued by horrible nightmares is released from the hospital and goes on a killing spree.

A group of teenagers in San Francisco discover a nest of homicidal monsters living in a tower of the Golden Gate Bridge, but when they try to tell authorities, no one believes them.