You can't trust your own memories. You can't trust other people's stories either. So how do you know what really happened that night?

Psychologist James Cobb gives a presentation on the art of recovering lost memory on a rainy night in New York. When he leaves, he is approached by a stranger: a dying man, who tells him that, about forty years ago, he woke up in a hotel room with a woman who had been killed, but he does not remember what happened. Cobb needs to know if he's dealing with an innocent man or a murderer. But the threads of this ancient mystery are much more tangled than they seem at first glance.