It all began when the King Acrisius abandoned his daughter named Danae. He "shipped" her and her son off into the ocean after finding out that the child (Perseus) would one day kill him, and the father was Zues. The two ended up washing onto shore and being discovered by their new soon to be family members
Perseus now had three parent figures in his life. Then, one day King Polydectes spotted Danae. he Instantly fell in love and asked her Marry him, and she rejected. He would have pressured her into the idea, but he was too frightened by Perseus.
KIng Polydectes began to develop a plan to convince Perseus to go on a mission that would surely get him killed. This would then allow him to marry Danae without Perseus getting in the way. His plan was to get Perseus to try and kill Mudusa
After Polydectes convinces Perseus to do this, Perseus heads to the gods to get items that will help him defeat the quest. Then they tell him to head to the graeae sisters to find out where Mudusa lives and the path to Hespirides. He then threatens them with their eye and gets all the imformation he needs .
When meeting Hespirides, they gave him a magic bag to store Mudusas head, winged sandals, invisibility helmet, and a reflective shield. He then went on to defeat Mudusa.
As Perseus was flying home, he spots princess Andromeda . He then saves her from be devoured by a dragon. Then he returns to his mother and King Polydectes, and hands over the head. Which in turn, kills the king by turning him into stone.