Trainers pool Cheon-soo (Kang Woo) lost everything because of gambling. In addition he also has a gambling debt that is very
big. One time, the person who gave him the red Kang (Jae-Hyeon) dating a bid to provide an interesting but with a very dangerous risk.
Blandish Cheon Kang-soo to take advantage of the talent pool as a marine boy interloper with the drug addict how to swim across the ocean. Because it is the best way to settle the debt-debt, Cheon-soo to take the bid even if it must be dangerous to the safety. Together Kang, trainers who have a pool large debt plan. In the process of the Cheon-soo with Yoo-ri (Si-Yoen), pin-up children of both Kang. Since his father died,
Yoo-ri children into foster Kang. But child care is suspicious if Kang is responsible for the death of his father. Aware Kang Yoo-ri suspicion because of this he gives a great affection to the Yoo-ri to become confused. From day to day Cheon-soo close to the Yoo-ri, so that they love each other. Cheon-soo and Yoo-ri plan to leave Kang and steal the money of drugs prohibited for the purposes of both of them. Marine boy story focuses on the action scenes of intense drama and suspense as the main attraction. Themes smuggling actions conducted in a way to swim across the ocean has never been a freelance story to be appointed as special points that will make movie get success