A fortysomething party animal named Lou (Rob Corddry) gets drunk and passes out after he unwisely guns his car engine in time to the music while parked in his garage and listening to Motley Crue. This is interpreted as a suicide attempt by his best friends Adam (John Cusack) and Nick (Craig Robinson), and although he tells him they're mistaken, they're not so sure. They're worried about their friend. He's a full-bore, full-time alcoholic without a shred of maturity or caution. What this boy obviously requires is a return to the ski lodge where they all got blasted together in the 1980s. Over Lou's protests, they drag along Jacob (Clark Duke), Adam's nephew. Adam wants to keep him out of trouble (hollow laugh).

Twenty years later, this lodge is so shabby, it looks not only like a poor excuse for a ski resort but even like a poor excuse for a movie set. That's part of the movie's charm. Did the Marx Brothers ever lavish money on sets? (Well, yes, but never mind.) The check-in routine is from Motel Hell, and the surly one-armed bellboy (Crispin Glover) kicks their luggage around, dumps it on the floor and sticks out his remaining hand for a tip.

They get the same big room they had before. It's gone downhill. The hot tub seems to harbor growth from the Planet of Mold. But there's a cheerful repairman (Chevy Chase) who plays the role that George Burns used to play, when you needed a guy who just looked like he knew the secrets of the universe. Chevy fixes the tub, and it starts to bubble with an inner glow, like beer on simmer. The guys jump in and are magically transported back in time to their youth in the 1980s. Jacob hadn't been born then, but never mind; it's their present selves who are transported.

This then becomes the premise for a comedy contriving more or less every possible problem and paradox, of which the high point is possibly Nick's boozy phone call to his wife, who at the time was still in grade school. A pretty girl named Alice (Lizzy Caplan) catches Adam's eye, although strict logic suggests they have little future together. And Corddry essentially steals the movie as Lou.

Remember how Corddry was always so earnest and sincere when assuring Jon Stewart of outrageous facts on "The Daily Show"? He brings the same focus to getting drunk. Comedy is a delicate art, with nothing so important as the performer never seeming to believe anything he does is funny. Corddry here achieves a level of comic confidence that seems almost uncanny; Cusack, as co-producer, and Steve Pink, the director (who wrote Cusack's "High Fidelity" and "Grosse Point Blank"), must have intuited this gift and been willing to give him free rein.