Hacker takes over the Radopolis cybersite and declares himself king. In an effort to dethrone him, the kids challenge Hacker’s hired hands to a skateboard competition. There’s just one catch: high-scoring tricks need as much area as possible. They also notice that the configuration of the field’s perimeter mysteriously keeps changing. With Digit as coach, the kids put on a dazzling display of skateboarding skills, but can they match their performance to the changing arena? Part of the "Cyberchase" series.