Na Kyung-soo, a diver, is angered to learn that the Coast Guard is assigning responsibility for the death of a fellow diver during the Sewol ferry disaster recovery to Ryu Chang-dae, the representative of civilian divers, and charging him with manslaughter.

Lee Ji-hoon
as Na Kyung-soo

Son Sung-ho
as Ryu Chang-dae

Park Ho-san
as Colonel Oh

Kim Young-taek
as Attorney Song

Kim Chae-won
as Prosecutor Jo

Gil Jeong-seok
as Jo Chi-byeok

Park So-yoon
as Na-rae's Mom

Go Gyoung-hee
as Hye-won

Park Min-seon
as Reporter Eun

Kim Gwi-seon
as Lee Byung-ho