Jack Butler (Michael Keaton) is a Detroit automobile engineer unjustly fired by his boss. Jack's wife Caroline (Teri Garr) is compelled to get a job to make ends meet, and is soon hired on as an advertising executive in a firm run by the shifty Ron Richardson (Martin Mull). This leaves Jack at home doing the housework and taking care of the kids, which he discovers is a lot more complicated than he ever imagined. Moving from breadwinner to househusband doesn't do much for his self-esteem, and he bides his time playing poker for coupons with a gaggle of neighborhood housewifes and pondering infidelity with dedicated homewrecker Joan (Ann Jillian). Among Keaton's fish-out-of-water bits: trying to maneuver a shopping cart with the inevitable wobbly wheels; and imagining a soap opera/film-noir episode in which he gives in to Joan's advances, only to be found out by Caroline.