Hard-boiled detective Dongsu encounters Sihyeon with a sketchbook. In the sketch, Dongsu sees figures with his wedding ring on. He soon realizes that the sketches show the future, and that his fiance is in danger.

Dongsu's fiance Jisu is in danger of getting killed by a garage worker, but Dongsu and Sihyeon saves her. Meanwhile, as the sketch represents, sergeant Dojin's wife gets murdered, hence Dojin swears to revenge on her death.

Dojin kills Dongsu's fiance by following orders from Taejun. Meanwhile, Dongsu and Sihyeon work together to find out who killed Dongsu's fiance, and Dongsu eventually finds out that it is Dojin.

CEO Nam tries to kill Dojin and solicits the man who killed Dojin's wife, who is in jail. Sihyeon sees this, and tries to prevent them, but ends up being kidnapped.

Dojin heads to where Ilsu is, according to CEO Nam's plan. Meanwhile, Dongsu finds Sihyeon before she dies, by tracing Ilsu's brother.

Dongsu saves Sihyeon and captures Ilwoo. Meanwhile, Dojin fulfills his revenge on Ilsu, but soon gets kidnaped by CEO Nam and his men. Therefore, Dongsu approaches CEO Nam to find Dojin.