A boy that has been raised by wolves is displayed as a circus freak. Then he grows up, becomes a zookeeper and falls in love with a prostitute. His jealousy brings out his wolf side, changing him into a wolfman so that he can kill her clients.

The screenplay for the film was written by Anthony Hinds under his pseudonym John Elder. Hinds was also the author of Hammer’s 1960 film The Curse of the Werewolf, which was also based on the same novel, Guy Endore’s The Werewolf of Paris.