To celebrate both of their wives turning forty, best friends Brian Malcolm and Stephen Harbaugh plan the ultimate caper: a double-surprise party in which their wives, Abbey and Gina, each aid in planning the surprise for the other. But will these hapless husbands be able to keep the secret, and how will their wives react once they realize they've been duped?

Hollywood publicist Ryan Fisher is planning a star-studded 40th to match his new life amongst the town's A-listers. Ryan even proposes a live "conscious uncoupling" with his husband, Brian. But when Ryan changes his mind about uncoupling just as Brian walks on stage in front of family, friends, and the Hollywood elite, is there time to stop the big announcement?

Once struggling to even afford groceries, entrepreneurs Notoya Green and her husband, Fred Mwangaguhunga, are now flush with money, success, kids, and famous friends. Her lavish 40th birthday party at The Broad Street Ballroom in New York City will even include a vow renewal ceremony officiated by Reverend Al Sharpton. But will a New York traffic jam gridlock Notoya and Fred's hopes to say "I do" for a second time?