After gathering all the special equipment from the gods like his sword that can never be broken, he travels to find Medusa. He travels with Hermes and after he gets his three gifts from the nymphs he goes on a quest to Medusa. He finds her sleeping on the ground next to the other gorgons.
The Road Back
When Perseus finds Medusa Hermes tells him to strike now while she was sleeping. So Perseus put on his cap of invisibility on flew within inches of Medusa. Then Perseus cut off her head and stuffed it his magic wallet. The other gorgons woke up angry but they could not see Perseus
After slaying Medusa Perseus took her head and as his prize to bring back to the King, Polydectes. He needed this head to give to the king or he would have been banished and the king would have married Perseus's mom. So he has to bring the head back to the king.
Return with the Elixir
After Perseus takes the head he starts to head home. On his way home Perseus encounters a perilous sea monster. He stopped the sea monster from devouring a lovely princess named Andromeda. Perseus took Andromeda home with him so he could marry her.
When Perseus returns home and tells the king that he had Medusa's head. The king didn't believe Perseus. The king told Perseus that if he even went near Medusa he would die. So Perseus pulled out the head from his magic wallet and the instant the king saw it he turned to stone.
After King Polydectes was turned to stone, kind Dictys became ruler of the island. Perseus, his mother and his wife sailed back to Argos. Danae wanted to see her father again so they journeyed to the city he was in. Perseus wanted to take part in the games Acrisius was at, but when it was Perseus's turn to throw the discus the discus hit his grandfather and killed him, fulfilling the prophecy.