After he's inadvertently added to their group text, a forty-year-old executive hopes to save his flailing career by joining a group of twenty-somethings on a wild three-day bachelor party.

With high school a distant memory, Jim and Michelle are getting married — and in a hurry, since Jim's grandmother is sick and wants to see him walk down the aisle — prompting Stifler to throw the ultimate bachelor party. And Jim's dad is reliable as ever, doling out advice no one wants to hear.