After a challenge from a rival mountain biking team, Shou and his friends find themselves mysteriously transported to another world. Soon learning that the path that back to their world may be at the end of a series of dangerous Mountain Bike races, Shou enters carrying the hopes of all his friends on his shoulders. Can Shou survive the Idaten Battle?

After a challenge from a rival mountain biking team, Shou and his friends find themselves mysteriously transported to another world. Soon learning that the path that back to their world may be at the end of a series of dangerous Mountain Bike races, Shou enters carrying the hopes of all his friends on his shoulders. Can Shou survive the Idaten Battle?