...Of Claude Rains' character in this picture. As has been stated, he is an older guy who loses out on Bette Davis to a younger guy. The younger guy is Paul Henreid playing a WWII survivor, thought dead by Davis. When she spots him at a concert in NYC years later, the handwriting is on the wall for Rains.
The mise en scene is the world of classical music, about which I know little but which sounds, uh, classical in several pieces played during the film. Henreid plays a cellist, so the pieces for the cello leave me out completely. Rains is a master composer, a genius referred to by his last name, Hollenius, thereby cementing his genius label. Not only is he a genius, he is a vengeful genius.
One does not often encounter such a high level of acting as that found in "Deception", and it elevates the film above the ordinary. All three principals are outstanding, especially Rains, whose performance towers over the other two. It is a character study and a straight drama. Speaking for myself I was not aware of any elements of 'noir', but if you are a fan of good acting, "Deception" is for you, as it is exceptional in this department.