Phil and Claire go overboard with drinks, and divulging personal information, on a night out to celebrate the sale of a house to Mitchell and Cameron's friends.

Claire must reign in her enthusiasm for Halloween and keep her celebration kid-friendly; Phil decides to hold an open house on Halloween; Mitch and Cam have a costume party; Gloria's hormones make her more quick-tempered than usual.

Mitch and Cam’s big day is finally here and nothing can ruin it, until nothing turns into a whole lot of somethings and puts wedding planner extraordinaire Pepper Saltzman to the test. Meanwhile, Jay and Gloria host the Tuckers, Phil squeezes in an eye procedure before the festivities and Claire embraces her role as “best woman".

The wedding day chaos continue as the entire party shifts from one contingency plan to another. Guests start to get testy, Mitchell and Cameron are feeling discouraged and poor Claire shows physical wear and tear, but an unexpected turn of events leads to the ceremony we’ve all been waiting for.

Mitchell and Cam settle in on their new normal, and Phil and Claire decide that one of the kids needs to move out in order to take control of the house again. Meanwhile, as Gloria becomes more successful at work, she notices Jay, Manny and Joe don’t seem to need her as much.