When an armored car driver is shot to death outside a grocery store, Monk is called in to investigate. Witnesses saw the shooter, who used the driver’s own gun for the shooting. Monk looks for clues, but before he can get too deep into the case, he gets a phone call from his brother, Ambrose. Apparently, their long-lost father called and is coming to Ambrose’s house that night for a visit. Monk is skeptical, but he decides to go see Ambrose anyway.