On the day of the school trip, Sejun and Seongcheol head to school by bicycle. Realizing they are running late, they park their bikes in an alley and rush to school. Soon after, news of a ferry accident arrives, and the bicycles remain there for a long time. Separation arrives in an everyday life that seemed like it would repeat forever. Seongcheol, left alone after losing his friend, takes the bicycle Sejun left behind and embarks on a journey to the Pamir Plateau, a place Sejun always longed to visit.