When Annie moves from London to a small town in the midwest, she struggles to fit in. She gets off to a bad start when she makes an enemy of her school's queen bee, Kelsey. But she discovers a new passion, the exciting sport of roller derby, and makes friends with the cool and quirky girls on her team, the Liberty Belles. She also meets Jesse, the friendly boy who works at the roller rink, and Tyler, a cute, all-American sports star.