In the dead of winter, David, a retired dentist in an unnamed town 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. 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 who don't appear to have David's best interests in mind.