Toby Fleishman thought he knew what to expect when he and his wife of almost 15 years separated. He could not have predicted that one day, in the middle of his summer of sexual emancipation, Rachel would just drop their two children off at his place and simply not return. As Toby tries to figure out where Rachel went, all while juggling his patients at the hospital, his never-ending parental duties, and his new app-assisted sexual popularity, his tidy narrative of the spurned husband with the too-ambitious wife is his sole consolation. But if Toby ever wants to truly understand what happened to Rachel and what happened to his marriage, he is going to have to consider that he might not have seen things all that clearly in the first place.