Catch the Ghost

Wangsuri Subway Police Investigation Team One's Captain Ko Ji-seok graduated as the valedictorian of the police university. But his only goal is a stable police officer life. One day, an event turns Ji-seok's peaceful life upside down.

Yoo Ryeong, Ji-seok's new partner and the rookie detective of the Wangsuri Subway Police, enters the tunnel and gets attacked. Now her job is at risk. An old deliveryman gets attacked at a station, and Ji-seok realizes it isn't a simple assault case.

"Do you want to eat ramyeon?" Ryeong and Ji-seok eat ramyeon in the night-duty room. Ryeong gets the chance to search the tunnel thanks to it. Meanwhile, Choi Do-cheol, a father and a husband who makes a living in the subway, goes missing.

The truth of Choi Do-cheol's case is revealed. Ji-seok realizes Ryeong is more than just crazy. Star fighter Kim Won-tae becomes the Subway Police's ambassador, but Ryeong uncovers his ugly truth. A crucial clue about the Locust Swarm is found.

Wangsuri Subway Police Investigation Team One's Captain Ko Ji-seok graduated as the valedictorian of the police university. But his only goal is a stable police officer life. One day, an event turns Ji-seok's peaceful life upside down.

"A woman who takes the first train after clubbing disappears." Ryeong and Ji-seok take the first train to see if this urban myth is true. Meanwhile, Ryeong faces the Subway Ghost after one month of working for the Subway Police.