What will cure the plague of Thebes?

In Sophocles' play "Oedipus Rex," the plague of Thebes is cured by uncovering the truth about King Oedipus's identity and the murder of King Laius. The oracle reveals that the plague is a punishment for the unpunished crime, and only by addressing this wrong can the city heal. Ultimately, Oedipus's quest for knowledge leads to tragic revelations that restore order to Thebes, albeit at a great personal cost.