Oedipus Rex by Sophocles tells the story of King Oedipus of Thebes who seeks to uncover the murderer of the former king. The play explores themes of fate versus free will and man's inability to control his destiny. It follows Oedipus as he discovers through a series of revelations that he unwittingly fulfilled a prophecy that he would kill his father and marry his mother. The play examines Oedipus' downfall from a position of power and authority to that of a blind beggar after his tragic discovery of the truth.