In Thebes, there is a great King. He goes to an oracle to learn if he will ever be able to have a child. The oracle tells him that he will have a son and the son will eventually kill his father and marry his mother. Despite this the King and Queen of Thebes have a son.
The King, not wanting the prophecy to be fufilled, binds the baby's feet together with pins and leaves him at a cliff to die. However, a kind shephard finds the baby and the baby survives.
The shephard brings the baby to a nearby castle in Corinth and the King and Queen raise the baby as their own naming him Oedipus, meaning swollen feet.
Oedipus grows up in Corinth and soon he hears about his prophecy. He does not know about his true birth and so beleives his real parents are who he is living with in Corinth.
You will marry your mother and kill your father.
In an attempt to free himself from his prophecy, Oedipus flees Corinth. Little does he know he is only putting himself closer to fufilling it as he goes on his journey.
While Oedipus is traveling, he comes across a man who he gets into an argument with and kills at a crossroad. He doesnt know that the man he has just killed was his father and so he continues on his way to Thebes.