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Accountant Kim Seong-ryong steals from anyone he can, including the mob, but still manages to escape prosecution. When a chief from TQ Group commits suicide and the company is investigated for fraud, employee Yoon Ha-gyeong suspects there is something else afoot.

Seong-ryong begins his new job at TQ Group but receives a chilly reception from his department. Prosecutor Seo Yool also takes a new position and plans to use Seong-ryong for his own ends.

Seong-ryong has earned a new upstanding reputation by his accidental action, but his department still isn’t convinced. Ha-gyeong suspects the driver of being involved in something bigger but is unable to find evidence.

After being arrested, Seong-ryong realizes he is in over his head with TQ Group. Ha-gyeong learns more about the company’s corruption from Choo Nam-ho.

Seong-ryong is unexpectedly brought in to deal with the company’s Chinese partners. A strike at TQ Delivery also presents a problem.

The handling of the union strike causes Chairman Park Hyeon-do to order Seong-ryong to be fired. Yool finds out that Ha-gyeong and Madam Jang Yoo-seon are working together.

After Seong-ryong’s latest arrest, TQ Group tries to force him to quit. Nam-ho convinces him to rent a room in his house.

Seong-ryong is as disruptive as possible while threatening to expose the company to the press. Won Gi-ok worries about his father when the labor union protestors are arrested.

Business Operations begins work on a revival plan that has higher stakes than they expected. The higher-ups involved in illegal activity scramble to get rid of evidence.

Work continues on the revival plan down to the wire. Seong-ryong tracks down people to testify against TQ Delivery.

Seong-ryong is overcome with guilt after the failure of his plan, but his coworkers, now in new departments, stay positive while striking back at those who wronged them.

Seong-ryong recruits help for his revenge mission against Yool. Park Myeong-seok receives a rude awakening.

While Yool goes after Director Jo Min-young, Seong-ryong researches TQ Retail’s unpaid employees.

Seong-ryong helps rally young store employees to sue TQ Group and finding evidence of corruption. Prosecutor Kim discovers Hong Ga-eun has been disobeying orders.

A traumatic experience scares Seong-ryong, but he vows to get revenge anyway. TQ Group’s audit approaches, so the accounting team works to cover up their fraud.

Business Operations investigates all of the company’s so-called assets. Ga-eun confesses her undercover role.

TQ Group has received a major blow, but Myeong-seok finds out the chairman is going to create a scapegoat to avoid consequences.

Seong-ryong tries to figure out how to rescue Yool from the detention center while pressuring higher-ups to confess what they know about TQ Group’s crimes.

Seong-ryong and his friends officially declare their intentions to take down Chairman Park, but finding evidence that cannot be covered up is tricky.

Even though Chairman Park has been arrested, he tries to cover his tracks by bribery. As TQ Group faces bankruptcy, Seong-ryong and his team try to figure out a solution.