Marin Johns is San Francisco’s Pollyanna couples therapist. She’s months away from wedded bliss when she discovers her fiancé is having an affair. After nursing her broken heart with Kleenex and break-up songs, she adopts a new brand of thinking when she uncovers a tell-all book that proves all men are liars and cheaters who will do and say anything so they’re not found out. No exceptions.

In an attempt to convince her friends of her newfound truth, she begins a fictitious relationship with James, a do-gooder from Montana. Marin seeks any means necessary to catch him cheating from hiring a PI to enlisting the help of a fidelity tester. Will her new "boyfriend" beat the statistic or will Marin regret the satisfaction of being right?