There once was a King called King Acrisius and one day he visited an oracle. The oracle told him that his own grandson would be the one to kill him. King Acrisius got so scared that he locked up his only daughter, Danae in a tower. The God, Zeus took pity on Danae and appeared to her in a shower of gold rain. Soon after this she became pregnant.
King Acrisius became so enraged that he ordered both of them to be locked in a box and thrown into the ocean and left to drown. Fortunately a kind fisherman by the name of Dictes found them washed up on the shore of the island Seriphos. However on this island was Dictes brother, King Polydectdes and he immediately fell in love with Danae but she refused to marry him.
Once Perseus grew older he also defended his mother against Polydectes. So Polydectes created an evil plan to get rid of Perseus. He made a fake wedding and requested a horse from each guest as a wedding gift but Perseus was too poor to afford a horse. Instead the King insisted that he bring back the head of the gorgon Medusa.
Once again the Gods took pity on Perseus so they gifted him a few items that helped him kill Medusa. The helmet of darkness, which made him invisible, a sword sharp enough to kill Medusa, a shield so shiny that Perseus could use it to look at Medusa in the reflection without being turned to stone and winged sandals which helped him travel far places quickly.
On his way back to Seraphos Perseus found a girl called Andromeda who's parents bragged about her beauty so much that as punishment the Gods set a sea monster on her town. An oracle told the village that the only way to get rid of the sea monster was to sacrifice Andromeda. But Perseus struck a deal with Andromeda's father that if he killed the sea monster he could marry Andromeda. And so he did.
Soon after Perseus' killing of the sea monster he competed in a discus competition. Weirdly enough King Acrisius was a bystander in the crowd. Unfortunately for him Perseus' discus had a slight collision with his head, killing poor old Acrisius and proving the oracle right. So once Andromeda and Perseus got married and King Polydectes was dumbfounded by Perseus' success they all lived happily ever after... The End.