A vessel is attacked by pirates 220 km northeast of Ji Long Port, Taiwan. The National Intelligence Service dispatches a secret agent after obtaining information that the vessel was carrying nuclear missile guidance kits stolen by a man named Sin. Sin has lived his entire life with one goal--to destroy the Korean peninsula. With the missile guidance kits in his possession, he attempts to execute his plan. Twenty years ago, his family tried to defect to South Korea, only to be sent back to the North as the South Korean government turned its back on his family due to concerns over its relationship with China. In the process of being handed over to the North Korean military, Sin witnesses the execution of his family followed by the separation from his only sister, Choi Myung-ju. As a result, Sin fosters deep-rooted hatred and fury. Meanwhile Naval Lieutenant Kang Se-jong is sent on a secret mission to find Sin, finally catching up with him in Russia and learns of the family's troubled history. Kang Se-jong meets Sin's elder sister Choi Myung-ju, now a prostitute in Russia and learns of the family's troubled history. During his pursuit, Kang Se-jong begins to feel compassion for Sin, but this does not hinder upon his mission to apprehend him.