A private detective tries to find out how and why some convicts have mysteriously disappeared from the prison of Dartmoor.

Mysterious murders committed by a criminal have kept the public on their toes and the police have mistakenly accused an imposter of the crimes.

Mr. Rossi and Mr. Capelli, co-owners of a successful traveling circus, have a rivalry over the affections of the lovely Dolores. That's all settled after Rossi is mauled to death by a lion. Years later a series of accidents, attacks and mysterious deaths plague the circus.

After an automobile accident, in which a man is unrecognizably burnt to a crisp, his wife's only able to confirm the corpse's identity by his talisman: a small, white spider. However, soon, there are more corpses walking around than at a comic con convention and every single one of them was a white spider sitting on or nearby the body.