Synopsis
An undercover investigative squad of homicide detectives is formed, and their extra-legal methods include wiretapping, communications monitoring and deep-cover infiltration. Among its members are Cha Geon-woo (Kim Bum), a former ROKN SEAL and KNP SWAT member who pursues his targets doggedly and is secretly on a revenge mission after his girlfriend's death; principled and perceptive team leader Jang Moo-won (Park Sung-woong), who was granted permission to form the squad and will personally face the consequences if it fails; Jang Min-joo (Yoon So-yi), who's skilled in disguise, psychoanalysis and martial arts; and sly Choi Tae-pyung (Lee Won-jong), who gets information from shady back-alley connections.
