Years after the end of the original trilogy, the formed Barden Bellas discover that The International Championship of Collegiate A Cappella has stopped being popular over the years, and due to negative results it will be canceled and ended after this year. Trying to find a solution, the classic girls get together and decide to divide into two groups, while some try to prevent the championship from being cancelled, others return to Barden University and try to organize and unite the current Bellas and Treblemakers to put on the greatest acapella performance of history.
