Plot # Pelias usurps the throne of Thessaly, killing King Aristo, but knows that a prophecy states that one of Aristo’s children will avenge him. The god Hermes, disguised as Pelias’s soothsayer, watches as the infant Jason, Aristo’s son, is spirited away by one of Aristo’s soldiers. Pelias slays one of Aristo’s daughters after she seeks sanctuary in the temple of the goddess Hera. Because the murder has profaned her temple, Hera becomes Jason’s protector. She warns Pelias to beware of “a one-sandaled man”.

Twenty years later, Jason saves Pelias from drowning in a river, an “accident” orchestrated by Hera, but loses his sandal in the process, so Pelias recognizes his enemy. Learning that Jason intends to seek the legendary Golden Fleece to rally support against him, he encourages Jason in the attempt, hoping that Jason will be killed.