Johnny returns to Hawaii to attend the wedding of his grandfather, the legendary Johnny Tsunami. But instead of catching a few waves while he's in town, Johnny's got his hands full keeping an eye on "Uncle Chris," the 12-year-old son of his grandfather's fiancée. Through Chris, Johnny is introduced to the Dirt Devils, a local dirtboarding team. When the Dirt Devils wind up in direct competition with Grandpa's surf shop, it's up to Johnny and Chris to join forces and save the day.

Special features: The dirt on dirtboarding: interviews with the cast and crew bring you into the world of this extreme new sport; Angle on: board stunts: take control of the different board angles in the movie, with audio commentary from Mountain Boarding legend Akoni Kama; music and more: music performances from T-Squad and Jonas Brothers.