After learning that his grandfather is alive and living in Seoul, a North Korean musician must leave his fiancee behind and accompany his family to South Korea.

Soyo, a quiet high school student, discovers inline skating. Mesmerized by the elaborate skating skills of Mogi, a member of the group, Soyo joins their team. Soyo's life is gradually consumed by the world of inline skating.

A mysterious woman enters the life of Suk-won, a lawyer who has lost his memory. As their relationship develops, secrets embedded in his memory slowly surface.