Accountant Kim Sung-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-gyung suspects there is something else afoot.

Sung-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 Sung-ryong for his own ends.

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

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

Sung-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 Hyun-do to order Sung-ryong to be fired. Yool finds out that Ha-gyung and Madam Jang Yoo-seon are working together.

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

Sung-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. Sung-ryong tracks down people to testify against TQ Delivery.

Sung-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.

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

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

Sung-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 Sung-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 Myung-seok finds out the chairman is going to create a scapegoat to avoid consequences.

Sung-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.

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