Their first week of high school. The biggest party of the year. Mistakes will be made as four teenage boys navigate a night of mayhem and debauchery.

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.

After exorcising the demons of his ex-, Malcolm starts afresh with his new girlfriend and her two children. After moving into their dream home, Malcolm is once again plagued by bizarre paranormal events.