Throughout the series, the SCIT uncovers that Customs officer Min Ju-yeong isn't just taking bribes—he is the absolute architect of Insung City's narcotics and illegal smuggling trade, using his official authority to clear cartel shipments.
Major Twists & Turns:
- The Internal Traitor: The police force is thoroughly infiltrated by Ju-yeong's informants, sabotaging SCIT operations (such as the Episode 8 tunnel transport trap).
- Dong-ju's Condition: Dong-ju suffers from progressive punch-drunk syndrome, risking blindness or severe brain damage if he continues taking blows to the head.
- The Grand Finale (Episode 16): Ju-yeong orchestrates widespread city chaos, setting off bombings and attempting a mass assassination at his Victory Hotel. During the final showdown, SCIT members combine their sports skills—Jong-hyeon's fencing baton strikes, Jae-hong's heavy disc throws, Han-na's snipers, and Man-sik's wrestling tackles—to dismantle Ju-yeong's forces. Dong-ju confronts Ju-yeong in a grueling fistfight, overcoming physical weakness to arrest him cleanly on live video broadcast, securing legal justice.
- Resolution: Min Ju-yeong is sentenced to life imprisonment. The SCIT is permanently recognized as an official elite violent crime division. Dong-ju and Han-na affirm their love, and Dong-ju finds peace running along Haeundae Beach, wearing his national team colors proudly.