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 unexpected scarcity. In a hilarious battle of will and determination, the father of the bride (Will Ferrell) and the sister of the other bride (Reese Witherspoon) chaotically go head-to-head as they stop at nothing to throw an unforgettable celebration for their loved ones.