Never mix business with pleasure. For badass secret agent Sam (Rebel Wilson), that hasn’t been difficult. But now she’s tasked with one of the hardest missions yet – being maid of honor for her childhood best friend. Deep out of her comfort zone, Sam barely maintains her cover as a dependable friend even on the day of the extravagant wedding. And what’s worse, the three bridesmaids are judging her every move. But when a team of mercenaries take the uber-wealthy wedding guests hostage, it’s up to Sam to do what none of the other bridesmaids can – wage war on anyone who would ruin the most important day of her best friend’s life.