Newlyweds Emma and Colin are suspicious when prosecutor Tamara McDermott is a no-show at a Boston dinner party. Matt Yankowski, head of HIT, Emma and Colin's small, elite Boston-based team, is a friend of Tamara's, and he needs them to find her. In London, a woman who was supposed to meet Emma's art-detective grandfather to talk about forgeries is discovered near death. Her husband, who stayed behind in Boston, has vanished. The couple's connection to Tamara adds to the puzzle. As the search for Tamara intensifies, a seemingly unrelated murder leads Emma, Colin and HIT deep into a maze of misdirection created by a clever, lethal criminal who stays one step ahead of them. As Emma draws on her expertise in art crimes and Colin on his experience as a deep-cover agent, the investigation takes a devastating turn that tests the strengths of their families and friendships as well as their FBI colleagues as never before.