The story begins on the island of Seriphus, the home of Perseus, and his mother Danae, Polydectes the king. He wishes to marry Danae, and plots to get rid of Perseus, because he will hold him back from marrying Danae.
King Polydectes tricks Perseus into going and getting Medusa of the Gorgons head. That is the plot of King Polydectes plan.
Perseus is sent to go on a quest to get Medusa's head. He runs into God's and they liked him so they decided to help him on his journey to get Medusa's head.
We are married.
The God's gave Perseus something to take with him. Athena gave him a mirrored shield and told him where to find the nymphs, and Hermes gave him a magic sword to use on journey. The nymphs gifted him winged sandals that allow him to fly, a wallet that expands, and a cap that makes him invisible.
Here is a mirrored shield.
Here is a magic sword.
When he got to the cave Medusa was sleeping, so Perseus got at his sword and cut her head off. Perseus got his wallet that the nymphs gave him to put her head in. He flew off with the shoes that the nymphs also gave him.
When he came back home he was married Andromeda and saved her mother. Perseus figured out what the king's plan was. Perseus saved his mother by showing the king and his men Medusa's head. Many years later, Perseus participated in a discus-throwing contest and accidentally flung the discus into the crowd and killed Acrisius which was his grandfather.