When two weddings are accidentally booked on the same day at the same venue, each bridal party is faced with the challenge of preserving their family's special moment while making the most of the unexpectedly cramped space. In a hilarious battle of determination and daring, the bride's father (Will Ferrell) and the other bride's sister (Reese Witherspoon) chaotically clash until they stop at nothing to create an unforgettable celebration for their loved ones.