Dr. Justin Wright has spent his life helping shattered minds heal.Then a patient walks into his office who may be beyond saving.Frank Devlin is losing time.Hours disappear. Memories fracture. He wakes to evidence of actions he doesn't remember taking — and a growing fear that someone else is living inside his life.At first, Justin believes it's trauma. A disorder he can treat. A puzzle he can solve.But as he digs deeper into Frank's past, disturbing events begin to invade his own world.Unexplained encounters. Violent threats. A sense that his family is being watched.What if the real danger isn't what Frank remembers… but what he does when he's gone?