Increasingly anxious about his impending marriage to Nat (Rashida Jones) and thoroughly bored with his day job as a wedding photographer, Theo (Chris Messina) establishes a hobby: he's hired by clients to clandestinely snap voyeuristic photos of them as they go about their days. Things go smoothly until a sexy exhibitionist (Meital Dohan) leads him into an all-consuming obsession. As Theo stalks her day and night, the woman's mysterious public trysts send him reeling, forcing him to confront uncomfortable truths about his sex life at home.