With a history of giving bad gifts, Claire is determined to surprise Phil with an amazing anniversary present: a private performance by one of their favorite musicians, Izzy LaFontaine. However, it turns out to be unexpected in more ways than one. Meanwhile, Mitchell and Cameron call up their "party-girl bestie", Sal, for a long overdue night out on the town.

Mitch and Cam's friend Sal announces she's getting married the next day and they are in the wedding; Gloria doesn't trust her new nanny; Claire bonds with Haley; Phil helps Luke with a girl.

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.

Jay shows Manny how to defend himself whilst Mitch and Cam decide to throw Sal a belated baby shower.

Fearful that the romance between him and Claire is fizzling, Phil calls upon his altar ego, Clive Bixby, to get Valentines day back on track. Meanwhile, much to Gloria’s chagrin, Jay shows a bit of child favoritism when they must deal with Joe’s inappropriate Valentine gift-giving and Manny’s dating indecisiveness. When Cam and Mitch try to empower Lily, Haley and Sal to stand up to the men in their lives, things don’t turn out as planned. Finally, Alex discovers she has a secret admirer who may be a little too involved with family.

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.