Perseus, the son of Zeus, ruler of the Olympian Gods, and Danae, daughter of King Acrisius, returned to the castle of Polydectes in the island of Seriphos with the head of the Gorgon Medusa.
Perseus was given the quest by Polydectes in order to get rid of him. Polydectes hypothesized that with
Perseus gone, he could marry his mother,
Danae, who previously turned him down.
After being given the quest, Perseus travelled far away to find Medusa, but realized how unachievable the mission was. One day, Perseus was visited by Athena and Hermes. They gave him weaponry and historical objects, and further information on Medusa's whereabouts.