After a travelling boxer named Eryx (Jorge Gonzales) fights and kills several townspeople, Hercules (Kevin Sorbo) slays him. He then receives a peacock feather which is an evil omen from the goddess Hera.
A beautiful young woman named Iole (Marlee Shelon) arrives at HerculesΓÇÖ home. She begs him to return with her to the village, where a gaping hole to the underworld has opened up, allowing evil spirits and dangerous fumes to escape