When Lou finds himself in trouble, Nick and Jacob fire up the hot tub time machine in an attempt to get back to the past. But they inadvertently land in the future with Adam Jr. Now they have to alter the future in order to save the past - which is really the present.

This film is funny and the jokes are terrific. Look, if you're reviewing this and your primary criticisms are directed at the plot construction or the "poorly developed" characters, please put down your film school for dummies book and lighten up. THIS MOVIE IS EXACTLY WHAT IT IS SUPPOSED TO BE. The plot is nothing more (nor should it be) than a vehicle for the jokes and the comedic talent of the COMEDIANS. Rob Corddry is sharply hilarious and the ensemble has plenty of chemistry for a TIME TRAVEL COMEDY!!!!! If you can suspend disbelief well enough to accept the basic premise, than you can climb the hill that is the rambling, aimless plot. It is quite funny and the cast does a great job in delivering the dialogue. The dialogue is the focus, not the plot or the characters and in that effort it succeeds. Watch the movie but please do not watch it if you're in the mood for a deep character study supported by an intricate, responsible and thoughtful plot. I give it 10 stars for being what it was intended to be - A TIME TRAVEL COMEDY WITH CRUDE, SARCASTIC AND HILARIOUS dialogue delivered by funny people.