In a world where a cappella music reigns, a young woman named Beca moves to college with big dreams of becoming a music producer. However, she finds herself caught up in the chaos of student life and in an unconventional female singing group called the Bellas. With a group of girls who have totally different styles and personalities, Beca is initially not very enthusiastic about the idea of joining them. However, as they compete against other a cappella groups on campus, Beca begins to discover the power of friendship and teamwork.
As they train for the national competition, the Bellas must overcome their differences and learn to work together, all while navigating the dramatic world of romantic relationships, rivalries, and a little bit of craziness. With her wit and creativity, Beca introduces new musical arrangements that revitalize the group's repertoire, unexpectedly blending genres and rhythms. But the road to victory is not without obstacles, including a fierce rivalry with the Treblemakers, a male group steeped in all the a cappella stereotypes. Amid intense rehearsals, hilarious fights, and heartwarming moments, the girls learn that music can bring them together in ways they never imagined, as they strive to prove that, with a little effort and the right harmony, they can reach the top.