Kim Gayeong is the best-selling author of "Office Misconduct," a story based on her first job experience five years ago. Gayeong's dreams to start her new job are shattered as she learns how tough the workplace can be. After being forced to take on unreasonable job requests and severe bullying from her supervisor, Nayeon, Gayeon decides to kill her. But her plans suddenly change when someone else murders Nayeon first. She's positive the culprit is from the office, but the question is, who?