Mu-jin and his team look for evidence to reclassify Nurse Cho Eun-young's suicide as an industrial accident, aiming to hold the hospital accountable for covering up suspected workplace bullying and medical malpractice. However, with Mu-jin blacklisted from the hospital, it falls to Gyeon-woo to infiltrate the facility and locate the one piece of evidence Mu-jin remembers seeing while possessed.

With the protest shut down by police, Mu-jin and the workers regroup to form a union, vowing to fight to the end. However, when the university refuses to meet their demands, they have no choice but to go on strike. Just as the situation begins to look hopeful, they encounter unexpected backlash from students, prompting them to question the very cause for which they have been fighting.

The flash drive and the witness vanish, leaving Mu-jin's case in shambles. Though morale is low, he resolves to keep fighting for the eight victims of the Buguk Warehouse fire. With Myungeum Constructions closing in and Mu-jin restrained, Hee-ju and Gyeon-woo race to recover the evidence. Will Mu-jin's final move be enough to turn the tide?

Mu-jin's push for a confession from President Kim puts everyone inside the poorly built Myungeum Tech Plaza in danger. As the structure begins to collapse, Assemblywoman Moon finally confronts the deadly consequences of cutting corners and vows to hold President Kim accountable. When a fire breaks out and all exits are sealed, President Kim is brought to his knees and forced to sign a contract for a second chance at life with the burning man in jeans.