Following their win at the world championship, the now separated Bellas reunite for one last singing competition at an overseas USO tour, but face a group who uses both instruments and voices.

Arriving at her new college, Beca finds herself not right for any clique but somehow is muscled into one that she never would have picked on her own: alongside mean girls, sweet girls and weird girls whose only thing in common is how good they sound when they sing together. When Beca leads this a cappella singing group out of their traditional arrangements and perfect harmonies into all-new mash-ups, they fight to climb their way to the top of college...

The Barden Bellas are back to pitch slap the world. It's been three years since the Bellas brought their signature vocals, style and attitude to become the first all-female group to win a national title. But when they get banned after a scandal that threatens to derail their last year at Barden, the three-time defending champs worry that this time they've lost their harmony for good. The Bellas must fight for their right to win the World Championships...