Dr. Reggie Lee, new at London's National Gallery, is planning a small exhibition of three almost identical Caravaggio paintings when she discovers a fourth. One must be a forgery. That discovery detonates multiple murders. Like Flavia di Stefano in Iain Pears' art history mysteries, Reggie is attractive, knowledgeable when it comes to art, and percipient when it comes to people with motives to defraud.