What is Oedipus Rex about?

I was reading a book about Jim Morrison written by Stephen Davis and Jim Morrison was explaining the lyric “Father, yes son, I want to kill you. Mother, I want to f*** you” (The End by the Doors) and he was saying it was derived from Oedipus Rex. I’ve come to understand it’s a play written by Sophocles but I’m not sure what it’s about. I don’t do well when it comes to reading material from this time period so I don’t really want to read the play but I do want to understand what Jim Morrison was trying to say.