Cassie Swanson is an orphan girl who is passionate about gymnastics. She works unhappily as a maid in a cafeteria. One day, she finds a mysterious letter and applies to a gymnastics school called Gynmastics High, which she gladly accepts. However, Harper Cunningham, a rich popular gymnast, is not very pleased with Cassie, She has her assistants, her two childhood friend Tyler, a playful inventor and her gymnastic friend and maid Sasha, to help her become the successful gymnast she has always dreamed.
