When two weddings happen to be booked on the same day at the same venue, each wedding party is challenged to preserve their family’s special moment while making the most of the unexpected shortage. In a hilarious battle of wills and determination, the father of the bride (Will Ferrell) and the sister of the other bride (Reese Witherspoon) face off chaotically against each other as they stop at nothing to organize an unforgettable celebration for their loved ones.