Marble City sheds a light on the skateboarding scene in Seoul, South Korea. The film focuses on Wongyu Kim, a skateboarder who has been part of the city's skateboarding scene for the last 16 years. Over the last two decades, Seoul and skateboarding have become gradually entwined. The scene, which was virtually nonexistent in the 90s, is now one of the jewels in Asia's crown.