[6] Theo is bored with his job as a wedding photographer—the generic backgrounds, the artificial posing, the stilted newlyweds—so he develops an unconventional side business, called "Gumshoot," a service where clients hire him to stalk them with his camera.

Becoming infatuated with one of his clients, a mystery woman who goes by the name Subgirl, Theo develops a voyeuristic obsession that forces him to confront uncomfortable truths about himself and his impending marriage with Nat.

Manohla Dargis of The New York Times reviewed the film positively, writing "With modest resources, some nice digital camerawork and an appealing cast — the likable Ms. Jones draws you in easily — Mr. Shapiro keeps you engaged even when his story falters.

"[6] Katey Rich of CinemaBlend wrote, "Without presenting anything particularly revolutionary or even unique, Monogamy is still a pretty satisfying take on a basic story that's fascinated filmmakers for decades.

"[7] She also praised its "elegant-- maybe a little over-elegant-- cinematography, an excellent sense of place within New York, an inventive score and a well-rounded supporting cast.