When psychiatrist Emma Tyler learns that a former patient has died from suicide, unease settles in fast. The woman had been frightened. Guarded. And in their final sessions, she shared secrets that still haunt Emma.

Unable to quell her concern, Emma is drawn back into the life her patient left behind. A volatile marriage. A history riddled with lies. And a growing sense that her curiosity has not gone unnoticed. When a chance encounter brings an unexpected ally into her life, Emma clings to the feeling of safety he offers, even as her instincts warn her otherwise.

Because someone is paying attention.

As Emma digs deeper, the threat around her sharpens, closing in on her and her young daughter. The closer she comes to the truth, the more she is forced to confront a chilling possibility. The danger she fears may not be waiting in the shadows. It may already be inside her life.