When Mikey (Michael B. Jordan) is dumped by his wife, his best friends Jason (Zac Efron) and Daniel (Miles Teller) make a pact to remain single with him until he gets back into the whirlwind of the New York dating game. But when Jason meets Ellie (Imogen Poots) and Daniel's friendship with Chelsea (Mackenzie Davis) turns into something more, the guys realise that the line between casual dating and a serious relationship is more complicated than they thought.