Despite the fact that things just never seem to go his way, Sang-ha always manages to find a reason to smile. A member of the school track team, Sang-ha loves to run, but distance has never really been his thing. For Sang-ha, sprinting is what brings him the most joy. Jin-won, on the other hand, is exactly the opposite. A record breaking marathon runner in high school, Jin-won is well on his way to becoming a marathon superstar. Determined to live up to the expectations of his coaches and colleagues, Jin-won cares about one thing and one thing only: running his next race.