Yong-Bi (Ji Soo), Sang-Woo (Suho), Ji-Gong (Ryoo Joon-Yeol) and Doo-Man (Kim Hee-Chan) 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.