Patrice is a successful gynecologist who’s grown tired of life with his high school sweetheart, Caroline. His best buddy, Eric, is a serial womanizer who’s about to flee France in order to escape the tax man.

During a weekend retreat in the country, Patrice and Eric get drunk while chatting about the good ol’ days. And then they tumble down the cellar stairs, and into a time warp that takes them back to 1986, where they’re about to finish senior year and begin their adult lives.