Harlan, an accountant, lives a repressed life with his sexually unfulfilled wife Lillian, who has her eye on the building's superintendent Larry. Harlan's obsession with catching the thief who steals sips of milk from his morning delivery ends in an act of irrational violence. In the aftermath, while Lillian and Larry make their secret plans, Harlan is overwhelmed by guilty paranoia with bizarre consequences. Set in the 1950s.