A sexy superior comes between two naval officers in this South Korean drama. The film follows childhood chums Kim Jun (Hyeon-jun Shin) and Lee Tae-hyeon (Yeong-ho Kim), who join the Navy and become deep-sea divers -- but the friendship ends after beautiful commander Kang Su-jin (Eun-Kyung Shin) arrives on the scene. When the trio gets assigned to the same underwater rescue unit, they must put their feelings aside to carry out a dicey mission.