In the year 2524, four centuries after humans started colonizing the outer planets, retired General James Ford gets called back into service when a hostile alien fleet attacks soldiers on a remote planet. The threat against mankind soon escalates into an interstellar war as Ford and a team of elite soldiers try to stop the imminent attack before it's too late.
College student Beca knows she does not want to be part of a clique, but that's exactly where she finds herself after arriving at her new school. Thrust in among mean gals, nice gals and just plain weird gals, Beca finds that the only thing they have in common is how well they sing together. She takes the women of the group out of their comfort zone of traditional arrangements and into a world of amazing harmonic combinations in a fight to the top of college music competitions.