Thirty-seven-year-old freelance writer Avery Jankowsky is devastated when his girlfriend, Deirdre, confesses that she has been having an affair. Beside himself with jealousy and grief, Avery accepts his uncle Ezra's advice—and his tickets to an all-expenses-paid international sex tour. Sensing a white-hot book idea (and a chance to get back at faithless Deirdre), Avery joins a group of mostly wealthy and accomplished travelers on a mad Nordic whirl, descending ever deeper into a world that is equal parts hilarity and nightmare.