After causing trouble, Dong-ju is demoted to the Insung Metropolitan Police Agency, where he's treated like dead weight and his fellow medalists also face discrimination; 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 medalists. Ready for a fresh start, each member joins with their own goals, but behind the creation of this special team lurks a hidden agenda.
Dong-ju seeks proof of Ju-yeong's involvement in the hit-and-run. Jong-hyeon investigates Gyeong-il's case at the Prosecutors' Office, while Ju-yeong has a secret meeting.
The team is complete with Han-na and Jong-hyeon. They investigate Gyeong-il's death and Min Ju-yeong, dividing into groups. Han-na gets her father's files.
The team must surrender Ju-yeong to prosecutors who intervene. As Dong-ju undergoes hospital tests after his accident, they investigate Ju-yeong's identity and prosecution ties.
Dong-ju uses Han-na's kiss as pretext for a private investigation, finding Ju-yeong's burner phone. Jong-hyeon worries about their growing closeness. Under watch, Drugmon plans to escape.
After Dong-ju's assault creates a crisis for the investigation team, Man-sik struggles to unite them. The team pursues Ju-yeong despite doubts, while she departs the hospital for parts unknown.
The investigation team, posing as quarantine staff, tracks Ju-yeong's drug operation at customs. They locate the drug container using Drugmon's tip but fall into Ju-yeong's trap.
Han-na's kidnapping leads Dong-ju and Jong-hyeon into a trap. As they face a deadly situation with seemingly no escape, a sudden gunshot changes everything. An unexpected sacrifice leaves the team's fate hanging.
The investigation team disbands. Dong-ju plots solo revenge against Ju-yeong, but his rash actions backfire. Ju-yeong discovers the scheme and retaliates.
The Special Criminal Investigation Team reunites and uncovers Ju-yeong's huge secret. Growing anxious over the provocative countdown sent by Dong-ju, Ju-yeong makes desperate moves. Who will have the last laugh?
Caught in Ju-yeong's trap, Dong-ju is severely wounded and confronts his most dangerous situation. Can he overcome this ordeal or will it be his downfall?
With nowhere to fall back, Dong-ju's team mounts their last desperate assault on Ju-yeong. As they charge ahead boldly, they encounter heavy resistance and unforeseen challenges. Their destiny hangs in balance.
In their last confrontation with Ju-yeong, Dong-ju and his team battle fiercely. As two unyielding fighters face off, only one can emerge as the ultimate victor.
The Insung Police mobilize against Ju-yeong's cartel. As they near victory, his brutal counterattack throws the city into chaos.
Amidst the chaos, Dong-ju and the team begin their final battle to determine Insung City's fate. With the weight of everyone's hopes and expectations on their backs, can they seize final victory and return as true heroes?