When Annie moves from London to a small American town in the Mid-West, 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.