The story begins on the island of Seriphus, Danae is the mother of Perseus. Polydectes is the king of the island and he wishes to marry Danae and tries to get rid of Perseus.
Magically, however, Danae became pregnant by Zeus and soon gave birth to a son, Perses. Her father's solution to the problem is to put them in a wooden chest and cast it into the sea.
King Polydectes persuaded young Perseus to fetch him the head of Medusa the Gorgon, thus hoping to get rid of him for good as anyone who looked at her would turn to stone. Perseus, young and naive, didn't know the dangers of his missions.
Perseus has to go find the nymphs of the north and the Graeae, the three sisters and guardians of the Gorgons. Perseus then traveled to the Graeae since they are the only ones who know the location of the Gorgons.
Perseus killed the monster with Medusa's head and he frees the princess.
On his way back home, Perseus passed near Joppa where he saw Andromeda, a beautiful princess chained to a rock. Perseus then came home a married man.