Park Dong Hoon is a middle-aged engineer who is married to attorney Kang Yoon Hee. However, his life is not that happy. He has 2 unemployed brothers, Sang Hoon and Gi Hoon, who rely on him and his wife is secretly having an affair with CEO Do Joon Young, Dong Hoon's college junior but current boss. One day, he receives an unexpected bribe and notices that his coworker Lee Ji An saw read morehim. Ji An is a young part-time worker at Dong Hoon's company who is drowning in debt and left alone to take care of her ill grandmother. Dong Hoon then gets entangled into his brothers' struggle to get back on their feet and the company's internal rivaliry between the company's CEO and the people opposing him, not knowing that CEO wants to get rid of him and Ji An is working for him.