In Ancient Greece, after imprisoning the Titans beneath the ocean, the rulers of the Greek gods, Zeus and his wife Hera, have a son named Hercules on Mount Olympus. While the other gods are joyful, Zeus' jealous brother Hades plots to overthrow Zeus and rule Olympus. Turning to The Fates for help, Hades learns that in eighteen years, a planetary alignment will allow him to locate and free the Titans to conquer Olympus, but only if Hercules does not interfere. Hades sends his minions Pain and Panic to dispose of Hercules. The two succeed at kidnapping the infant and feeding him a formula that turns him mortal, but fail to remove his superhuman strength before Hercules is found and adopted by the farmers Amphitryon and Alcmene.
