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After causing trouble, Dong-ju is demoted to the Insung Metropolitan Police Agency, where he's treated like dead weight and his fellow world-class medalists also face discrimination and scorn. But when a major case erupts, it reignites the fire in their hearts.

At Man-sik's suggestion, a special criminal investigation team is formed with the former world-class medalists. Ready for a fresh start, each member joins with their own hopes and goals, but behind the creation of this special team lurks a hidden agenda.

Convinced that Ju-yeong is the hit-and-run driver, Dong-ju scrambles to find evidence. Meanwhile, Jong-hyeon heads to the Prosecutors' Office at Man-sik's request to investigate Gyeong-il's case, and Ju-yeong meets someone in the shadows.

The Special Criminal Investigation Team is now complete with Han-na's return and Jong-hyeon joining. They launch a full-scale investigation into Gyeong-il's death and Min Ju-yeong. As they split into teams and close in on their targets, Han-na receives her father's case files.

While investigating Ju-yeong, the Special Criminal Investigation Team is forced to hand him over to the prosecution after their sudden intervention. Dong-ju is hospitalized for tests following his car accident, and the team digs deeper into Ju-yeong's true identity and his connections to the prosecution.

Using Han-na's surprise kiss as an excuse, Dong-ju heads out alone with her on an investigation and discovers Ju-yeong's burner phone. Jong-hyeon finds himself growing uneasy as Dong-ju and Han-na get closer. Meanwhile, Drugmon, under surveillance in an apartment, begins plotting her escape.

Dong-ju's assault puts the Special Criminal Investigation Team in a major crisis. Man-sik fights to keep the team together, while the others continue investigating Ju-yeong, weighed down by uncertainty. Meanwhile, Ju-yeong leaves the hospital and heads to an unknown destination.

The Special Criminal Investigation Team catches wind of Ju-yeong's drug smuggling and infiltrates the customs office disguised as a quarantine unit. Following a lead left by Drugmon, they manage to find the container hiding the drugs but walk straight into a trap set by Ju-yeong.

Han-na is kidnapped, and Dong-ju and Jong-hyeon rush to rescue her, only to find themselves trapped in a deadly crisis. Just when it seems there's no way out, an unexpected gunshot rings out. With an unforeseen sacrifice shaking the team, will they survive?

The Special Criminal Investigation Team is disbanded in the end. Dong-ju quietly prepares revenge against Ju-yeong alone, but his reckless move only invites a greater crisis. Catching on to his plan, Ju-yeong launches a counterstrike.

The Special Criminal Investigation Team reunites and uncovers Joo-young's big secret. Frightened by Dong-joo's countdown challenge, Joo-young takes desperate measures. So who will win in the end?

Falling into Ju-yeong's trap, Dong-ju suffers a critical injury and faces his greatest crisis yet. Will he push through or fall where he stands?

With no way to retreat, Dong-joo and the team launch their final all-out attack on Joo-young. Moving in without hesitation, they soon face a fierce counterattack and unexpected difficulties. What is written in their fate?

Facing their final showdown with Ju-yeong, Dong-ju and the team fight desperately to win. In this fateful battle between two men who refuse to give up, who will be the true champion left standing in the ring?

The entire Inseong police force unites and launches a massive operation against Joo-young's gang. But just when they are close to victory, Joo-young's most devastating counterattack throws the entire city into chaos.

Amidst the chaos, Dong-joo and Team Inseong begin their decisive battle to determine the fate of the city. Carrying the weight of everyone's hopes and expectations on their backs, will they be able to achieve the ultimate victory and emerge as true heroes?