Four pals are stuck in a rut in adulthood: Adam has just been dumped, Lou is a hopeless party animal, Craig is a henpecked husband, and Jacob 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.

After receiving a large sum of money on his bank account by mistake, a small-town thirtysomething dissatisfied with his life sees the opportunity of turning back the clock to when things were good, reliving the carefree life of an university student in a big city. Here, he falls in love with a girl and gets her pregnant. There's just one problem: he already has a wife and a daughter back home!

Glen, a complete stranger, appears at the door of Elizabeth Carter, a middle-aged woman, and claims to be the illegitimate son she gave away at birth.