In the dead of winter, David, a retired dentist in Ohio, is pretty sure his wife, Franny, is dead. But he can’t quite figure out what killed her or why she had to die. Disoriented by grief, David struggles to unravel these mysteries—which become increasingly baffling when he starts finding a series of elaborate and escalating threats hidden around his home. Who left these notes? Was someone out to get Franny? Are they coming for him? Unfortunately for David, Detective Chico is also on the case and is intent on asking him questions that he doesn’t know the answers to and introducing him to people—including a therapist practicing dream analysis in David’s garage without his knowledge or consent—who don’t appear to have David’s best interests in mind. With no one to trust, David is forced to rely on his own memories and faculties, but they, too, are proving unreliable.