While continuing his quest to figure out who he is and from where he came, John Doe must use all his unique abilities to solve a gruesome murder case, initiated when a seemingly innocent individual dives into a swimming pool which he discovers is filled with human blood. Meanwhile, Lt. Jamie Avery, impressed with Doe's ability to help the police with the case, attempts to surreptitiously learn his real identity. Karen is fired from her waitress job at The Sea and convinces Doe that he needs her as his assistant. Also, a mysterious woman may have information on Doe's identity.