In a small Midwestern town, a deadly annual ritual unfolds when the mythical nightmare, Sawtooth Jack, rises from the cornfields and challenges the town’s teenage boys in a bloody battle of survival.

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.