From the dark night to the bright morning, the marine police search for Du-Hak. Jung-Shin is devastated after hearing from Cheol-Woong that it seems Du-Hak has drifted out to sea. Three years later, Cheol-Woong works with Choong-Sung after returning from an assignment in the area. Meanwhile, Jung-Shin hears shocking things about Cheol-Woong from Du-Hak's mother.