The radical true story behind three teenage surfers from Venice Beach, California, who took skateboarding to the extreme and changed the world of sports forever. Stacy Peralta, Tony Alva and Jay Adams are the Z-Boys, a bunch of nobodies until they create a new style of skateboarding that becomes a worldwide phenomenon. But when their hobby becomes a business, the success shreds their friendship.

On a hot sunny day in Kansas, 1973, Mike Kinross's parents tell him he's going on holiday to his Uncle Dan's house. But instead they drop him off at the juvenile unit of the local mental institution.

An elderly, yet young-at-heart man, moves in with his grandson, and both their lives turn upside-down.