FBI Agent Dillon Savich is on a challenging case involving the kidnapping of two teenage boys when trouble boils up in his personal life. His younger sister Lily has crashed her Explorer into a redwood in California's Hemlock Bay. Is it another suicide attempt, the second since the loss of her young daughter some seven months before? Savich and Sherlock discover that four of Lily's paintings, left to her by their very famous grandmother, artist Sarah Elliot, now worth millions, are at the heart of an intricate conspiracy. Lily and art broker Simon Russo are thrust into ever-widening circles of danger that radiate from a notorious collector's locked room.

Dillon and his sister Lily both have to face their worst fears to survive.