Doh Bae-man, who is only loyal to money, is counting the days until his five years of military service are over so he can be scouted as a partner at a private law firm. In comes Cha Woo-in, a confident protector of the law who refuses to blindly obey her superiors. Bae-man warns her not to cause any trouble until he gets discharged.

Noh Tae-nam, who is in a crisis because of the missing Alan, suggests Yong Moon-goo use Doh Bae-man for their own gain. Bae-man chases after the red-haired culprit caught on the CCTVs at Alan's hideout and seeks a chance to get closer to President Noh Tae-Nam. Meanwhile, Bae-man begins to grow suspicious of Woo-in, who is different from how her personnel files describe her.

Is the red-haired culprit Cha Woo-in? Doh Bae-man works to uncover Woo-in's true identity. At the same time, he must exonerate the military doctor charged in Noh Tae-nam's conscription project to ensure its success. However, Noh Hwa-young is furious when she learns of her son's plan from Yong Moon-goo and of the prosecutors aiding him. Will this be Bae-man's last case as a prosecutor?

The red hair Cha Woo-in appears in front of Bae-man! Bae-man is shocked by the unbelievable fact. Still, unsolved mysteries overwhelm Bae-man, but the discharging day is coming. Meanwhile, Yong Mun-gu and No Hwa-young conspire army joining for escape purpose of Tae-nam who is about to be sentenced.

Now a private attorney, Doh Bae-man makes a bold return, while Cha Woo-in takes on Noh Tae-nam's military trial. With their paths diverging, Bae-man recovers a missing piece of his past and seeks out Woo-in, who may hold the final truth.

Doh Bae-man returns as a military prosecutor! He promises to be Cha Woo-in's loyal hunting dog in her revenge against Noh Hwa-young. However, Bae-man's solo actions strain their trust from the start. As the two of them chase after Noh Tae-nam, who has defected from the military, will their unsteady teamwork remain intact?

After capturing the defected Noh Tae-nam, Doh Bae-man and Cha Woo-in embark on their full-scale revenge. Their first target: the shooting of the Battalion Commander. As the true identity of the killer is revealed, shockwaves ripple through everyone. Beneath the "hero of mines" myth, the true face of the commander emerges, and the duo aims to take down Noh Hwa-young once and for all.

Doh Bae-man and Cha Woo-in are met with severe punishment from the disciplinary committee. Nevertheless, they continue their secret investigation inside and outside the army to reveal the truth about the landmine incident. The more they dig, the more mind-blowing truths they uncover! Will they be able to disclose the truth about the so-called "hero of mines" and clear their names?

Doh Bae-man and Cha Woo-in suspect Noh Hwa-young as the architect behind the Won Ki-choon "hero of mines" hoax. They pressure Noh Hwa-young by conducting a press conference with Sergeant Koo, the sole witness, on the same day as the victim's surgery. But on the day of the press conference, Sergeant Koo doesn't show up and everything is about to be ruined.

After the shocking death of Won Ki-choon, Doh Bae-man and Cha Woo-in find key evidence from his secret safe and choose their next target: the untouchable Corps Commander Hong Moo-seob. Sensing something off at Hong's residence, Bae-man charges ahead with the investigation, but Woo-in unexpectedly holds him back. Meanwhile, Sergeant Ahn approaches Noh Tae-nam, who is having a hard time in the army.

Doh Bae-man finally faces Noh Hwa-young, while Cha Woo-in faces Yong Moon-goo in the IM office. Their plans are on the verge of being exposed. Meanwhile, Bae-man does everything he can to take over the investigation of the corps commander abuse case, in order to atone for his past deeds against Sergeant Shin. Noh Hwa-young and the Patriotic Society plan to manipulate the trial behind the scenes.

Just before the trial, Doh Bae-man and Cha Woo-in confirm the truth about the Corps Commander's violent assaults. They do their best to prove Staff Sergeant Shin's suffering, but the trial begins on a completely uneven playing field due to a corrupt military judge! That night, Woo-in receives an unexpected call from Noh Hwa-young, and Noh Tae-nam finds out about Sergeant Ahn's true identity.

With the Corps Commander trial brought to a successful close, Doh Bae-man and Cha Woo-in uncover signs of internal conflict within the Patriotic Society. Just as Bae-man predicted, Hong Moo-seob reaches out and reveals a secret that could bring the entire society down. Meanwhile, their ally Kang Ha-joon goes off the grid, and a major incident erupts at the GOP where Noh Tae-nam is stationed!

As Doh Bae-man and Cha Woo-in prepare for the GOP shooting trial, they dig into the truth behind the platoon's abuse, but the surviving soldiers give identical, rehearsed statements, and Private Pyeon refuses to speak. Meanwhile, Yong Moon-goo, fixated on the Patriotic Society's X-files, pushes ahead with a new weapons project, while Noh Hwa-young pressures her son, Noh Tae-nam, to commit perjury.

Fueled by Noh Tae-nam's shocking testimony, the prosecutors move to dismantle the Patriotic Society. Starting with Noh Hwa-young's perjury charges in the GOP shooting case, they target key players and form unlikely alliances. Meanwhile, an unexpected guest crashes Yong Moon-goo's emergency shareholders' meeting, threatening his bid to take over IM!

After a night of gunfire and explosions, the military prosecutors and Noh Tae-nam are rushed to the hospital, facing their greatest crisis yet. Meanwhile, Yong Moon-goo prepares a final counterattack to reset everything. Can Doh Bae-man and Cha Woo-in overcome the odds and bring Noh Hwa-young to justice in their final hunt?