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.

During World War II, a German woman, Inga, goes missing and is presumed dead. Her infant son is placed in an orphanage where, years later, he's adopted by a childless couple. The adoptive parents' happiness is shattered when Inga reappears and insists on custody of her son.