The second of two beautiful women is murdered on a train, and the primary suspect is an amnesiac man. A psychologist, Dr. Eddie "Fitz" Fitzgerald, an old friend of the second victim, is brought in to help.
As Fitz takes the amnesiac, Thomas Kelly, into his care to regain him his memory, doubts begin to sour about Kelly's guilt after an anonymous man claiming to be a priest commits the greatest sin ever: repeating a confession to the police.
Sean Kerrigan and Tina Brien, two of society's rejects, are drawn together and will do anything to stay together forever, even murder. Fitz is drawn into the conflict when he begins to uncover the murder of Tina's loan shark.