Four best friends, Yong-bi, Ji-gong, Sang-woo and Doo-man who just turned twenty and just came of age took the road to Pohang, a small city near the beach—since one of the friends, Sang-woo, is enlisting in the marine corps the day after. On the last day before Sang-woo 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.
김지수
as Yong-bi
수호
as Sang-woo
류준열
as Ji-gong
Kim Hee-chan
as Doo-man
김동완
as Yong-bi's Older Brother
김종수
as Chief Oh
최준영
as Detective Choi
이주실
as Sang-woo's Grandmother
문희경
as Ji-gong's Mother
유하복
as Doo-man's Father
Lee Ji-yeon
as Park Eun-hye
Jeong Do-won
as Detective Baek
