Yong-bi, Sang-woo, Ji-gong, and Doo-man are four 20-year-old friends. They take a trip to Pohang for one night and 2 days for Sang-woo who is about to enlist in the military. At night, they drink on the beach and watch the night view of the sea. At that time, the friends see a woman being beaten by a man. They run to save her.