It's time to ride and save the day! Lindsay can't wait to spend her summer break reading comics and watching superhero movies--until she finds out she'll be moving in with her weird older cousin Phoebe instead. And Phoebe has big plans for Lindsay: a BMX class at her bike park with cool-girl Jen and perfectionist Ali. Lindsay's summer of learning awesome BMX tricks with new friends and a new bike turns out to be more epic than any comic book-and it's all leading up to a big competition. But some of the boys don't think girls should be allowed to compete. Now it's up to Lindsay, Jen, and Ali to win the competition and prove that anyone can be great at BMX.