David follows over five years his brother Louis – a slalom skateboarding champion –trough his evolution as an athlete. With an introspective approach, he tries to find common features in both their paths and stumbles upon the concept of grace. It thus forces Louis to ponder upon philosophical questions, while David finds himself trapped in the reflective process he started. The fraternal competition transforms into an understanding process developing through different approaches: interviews with skateboard and slalom riders, discussions between brothers and an aesthetic study of the sport.