Four pals are stuck in a rut in adulthood: Adam (John Cusack) has just been dumped, Lou (Rob Corddry) is a hopeless party animal, Craig (Craig Robinson) is a henpecked husband, and Jacob (Clark Duke) does nothing but play video games in his basement. But they get a chance to brighten their future by changing their past after a night of heavy drinking in a ski-resort hot tub results in their waking up in 1986.