On the Verge of Insanity

Hanmyeong Electronics undergoes a mass layoff of their workers. However, for Mr. Choi Ban Seok, he gets assigned to the Changin Business Department. Although his experience and expertise in electrical appliances land him a desk job, he opts to keep working with his hands. He arrives at Hanmyeong Electronics Changin Campus for his first day of work, where he meets Han Se Gwon, his team leader.

Ja Young arrives at Hanmyeong Electronics in Changin and smacks Se Gwon across his head for sending Ban Seok to work in HR when he has no experience in the field. Meanwhile, Ban Seok finds out that Se Gwon had secretly switched a part in the vacuum robot to pin the malfunction on him. Nevertheless, Ban Seok tries working in HR even without Ja Young's support.

Ban Seok convinces Ja Young that he will learn HR's ropes and makes it on the team. However, his first task puts him in front of Han Se Gwon, an unbearable person for him to be questioning. Meanwhile, the team leader of the Motor Team, Kang Min Goo, sexually harasses a woman in the company and refuses to apologize.

Ban Seok finds himself in a blackmail and sabotage scheme between Han Se Gwon, No Byung Guk, and Kang Min Goo, but it ends up backfiring on him. With his neck on the line, he thoroughly investigates to get to the bottom of things and proves his credibility. Meanwhile, Ja Young tries to figure out how to save two valuable members of the Motor Team from resigning.

Ja Young gets faced with the difficult task of reducing Changin Business Department employees by 40 percent. Without a way of knowing who to keep and who to let go, she proposes a company-wide job adequacy test to come up with a list. Meanwhile, everyone at Hamyeong Electronics scrambles to create a project proposal and asks Ban Seok for his help.

Ja Young earnestly asks Ban Seok for his help regarding the job adequacy test. She even gives him her personal credit card to sway his colleagues who have made this into a company vote. Meanwhile, a senior researcher speaks her mind when she gets humiliated by Se Gwon, who had stolen her proposal and left her out of the Task Force Team.