Eun Ho-won faces repeat rejections in her job search until despair drives her to attempt suicide. At the hospital, she learns she might be terminally-ill, but then at the same time, she also finally succeeds in getting hired. Thinking she has nothing to lose, she tackles her job and life with new perspectives. Her superior at work, Seo Woo-jin, considers her a pain in the neck. They become a bickering pair.
A 28-year-old woman who never succeed at getting a steady job. Tired and sick of her life and multiple part-time jobs she does, she tries to commit suicide. She gets both happy and sad news at the same time. That she might be terminally-ill but also finally succeeds in getting hired as a contractual employee. Thinking she has nothing to lose, she tackles her job and life with new perspectives and bolder attitude.
A 38-year-old man who is the Head of Marketing team. He is an elite workaholic with perfect qualifications and work results. But he has uncompromising personality and sharp tongue, which often makes him at odds with his coworkers.
A 32-year-old man who has been failed to pass national civil service exam a few times, which resulted in him lacking professional work experience. Despite being abandoned by his materialistic girlfriend, he is still a romanticist at heart.
A 34-year-old emergency physician, he was the one who takes care of Ho-won when she was brought to the hospital after her attempted suicide. He keep tabs on her ever since and after he knows she works at his family's company, he becomes her secret guardian.
A 28-year-old man who comes from a wealthy family in Gangnam. He has received the best education and upbringing that money can buy. Unfortunately, he suffers from panic disorder, which resulted in multiple failures of job interviews.