High school teacher Mr. Carter thought his secret relationship with Lily, a bright but troubled student, was something he could control-a dangerous game he could walk away from when the guilt became too much. But when he tries to end things, Lily refuses to let go. Her heartbreak turns into obsession, her love into a terrifying fixation. As her threats escalate from blackmail to violence, Mr. Carter realizes too late that he is no longer in control. Trapped in a twisted nightmare of his own making, he must find a way to escape before Lily destroys his life-or worse, takes it.