Investigative apprentice Lyra Brazier is unsettled when her boss, Raina, suddenly disappears. Her last known appearance at an exclusive hotel and health spa. Lyra isn't happy when she's saddled with a partner, Simon. But it turns out that Simon is much more than he seems: He has a unique gift that allows him to detect secrets, a skill that is crucial in finding Raina. The unlikely duo falls down a rabbit hole of twisted rumors and missing socialites, discovering that the health spa is a façade for something far darker than they imagined. With a murderer in their midst, Raina isn't the only one in grave danger--Lyra is next.