When he was born, Perseus was cast into the sea in a chest, along with his mother. He was raised on the island of Seriphus, but his mother was held prisoner by King Polydectus.
Perseus is told by King Polydectus to slay the fearsome Medusa, who is a gorgon who can turn people to stone with her gaze.
The god Hermes and the goddess Athena aid Perseus on his quest. He persuaded the 3 Gorgon Sisters to help him by stealing the 1 tooth and 1 eye they all share. They give him winged sandals for flight, the cap of Hades for invisibility, and a sword slaying Medusa.