Introducing two very different sister sleuths Zara, lawyerly and just a little cynical, teams up with her older sister, Lilly, when a possible Caravaggio sketch and its curator both go missing from a San Francisco museum. Lilly's never met a man-or a scam-she didn't at least wink at. Meticulous Zara discovers that a major museum donor who was dating the missing curator turns out to be a handsome, wealthy criminal. That's all Lilly needs to hear before she's all in to join the chase. Threaded through this modern-day mystery are flashbacks to a journal kept during World War II by the father of one of Lilly's many boyfriends. The search moves from San Francisco to New York City to an old barn in Alsace, France, where the curator and the Caravaggio may, or may not, be hiding.