The Oracle at Delphi told King Acrisius that his daughter, Danae, would have a son who will kill him. A cruel king named Polydectes wanted to marry his mother. The king knew that Perseus might cause trouble for him. Acrisius told Persues to fetch him the head of Medusa, so Perseus got the head and killed Polydectes's men to save his mother.
Hermes gave Perseus a magic sword to use on his journey, and Athena gave him a mirrored shield and told him where to find nymphs. Perseus found out the secret of how to kill Medusa. The nymphs of the north gave him winged sandals that allowed him to fly, a wallet that would expand to hold anything, and a cap that would make its wearer invisible.
King Acrisius put Perseus and Danae in a wooden chest, which he cast into the sea. A cruel king named Polydectes wanted to marry Perseus's mother.
Perseus decapitated Medusa before she woke up. He put her head in the wallet and fled.
Perseus had fallen in love with princess Andromeda at first sight and offered to kill the monster if he was allowed to marry her.
When he got home, he found his mother imprisoned at the alter where Polydectes confined her until she either agreed to marry him or died of hunger. Perseus rescued his mother by turning Polydectes and his men in stone with Medusa's head.