Two academic teenage superstars realize, on the eve of their high school graduation, that they should have worked less and played more. Determined to never fall short of their peers, the girls set out on a mission to cram four years of fun into one night.

Stillman, a heartbroken physics student, builds a time machine when his girlfriend breaks up with him. Going back in time, he attempts to save their relationship by fixing every mistake he made—while dragging his best friend along in the process.

They're ordinary husband and wife realtors until she undergoes a dramatic change that sends them down a road of death and destruction. In a good way.

Hoping to bring his family closer together and to recreate his childhood vacation for his own kids, a grown up Rusty Griswold takes his wife and their two sons on a cross-country road trip to the coolest theme park in America, Walley World. Needless to say, things don't go quite as planned.