Four boys are running for it in a remote beach town. The police are chasing them up close. This risky pursuit is put to an end by a hit-and-run accident, and the boys are taken to the station. The boys express their innocence while the police try to press charges against them. To make things even more complicated, the only witness makes a false statement. Earlier that morning, the four best friends who just came of age took the road to Pohang?a small city near the beach?since one of the friends, Sangwoo, is enlisting in the Marine Corps the day after. On the last day before Sangwoo goes off to the army, a life-changing incident dawns in front of them. The four best friends now face a situation beyond their control, and are forced through an irrevocable day.