King Polydectes demanded that Perseus retrieve the head of Medusa for him.
I demand you to go get the head of Medusa
I will get you the head of Medusa
Perseus went to ask Athena, Hermes, and Hades for help and got something from each. Athena gave him a shiny shield that he could use as a mirror so that he didn't have to look at Medusa. Hermes gave him winged sandals so that he could fly to where Medusa lived without being heard. Hades gave him a helmet of invisibility so that he could sneak up on Medusa.
Can I have some help defeating Medusa?
Perseus goes to the three grey sisters and asks them where he can find Medusa. At first, they say no so then he takes their eye and then they are forced to tell him where Medusa lives.
We will tell you where Medusa is.
Can you show me the way to Medusa?
Then I will take your eye!
Perseus arrives at the cave and beheads Medusa using the reflection from his shield. Pegasus then sprang from Medusa's head.
Perseus takes Medusa's head and quickly flies away with the other angry gorgons chasing him.
Ahhhh! Get back here!
Perseus comes back with the head and shows it to King Polydectes. The king turns to stone and Perseus and Danae are free.