My Mister

The eldest, Sang-hun, is unemployed and in debt. The youngest, Ki-hun, is a director who's never debuted. The middle child, Dong-hun, is a hard-working office worker. One day, he receives a misdelivered bribe of 50 million won in gift certificates.

Ji-an attempts to pay off her debts with the stolen bribe but is forced to run as Kwang-il quickly catches on. Meanwhile, Dong-hun, certain that Ji-an took the bribe, attempts to get it back from her with his brothers' help but to little avail.

Director Park tries to identify the company that sent the bribe to Dong-hun, making Jun-yeong and Director Yun nervous. Ji-an, who's made a deal with Jun-yeong, secretly sets up a trap with Ki-beom to get Director Park and Dong-hun fired.

Dong-hun is confused as Ji-an makes a move on him, not knowing it's part of her plan to get him fired. Director Park falls into Ji-an's trap and tries his best to recover, but it's not easy. Jun-yeong gets uneasy about Ji-an's recklessness.

With Director Park driven out of his position by Ji-an's scheme, the odds get tilted in Jun-yeong's favor. Director Park tries to reverse the tables with Dong-hun's help, not knowing Ji-an is eavesdropping on Dong-hun's conversations.

Dong-hun is stunned to realize that his investigation into Jun-yeong's call records leads him to Yun-hui's office. Sang-hun and Ki-hun spend time with Dong-hun who is dispirited. Ji-an starts to sympathize with Dong-hun as she continues to eavesdrop.

After learning of the affair between Yun-hui and Jun-yeong, Dong-hun visits the campsite, much to Jun-yeong's surprise. Jun-yeong's relationship with Yun-hui begins to change. Director Park suspects that Dong-hun is withholding information.

Kwang-il witnesses Ji-an with Dong-hun at a bar after following her. Meanwhile, Senior Director Wang and his people try to destroy Jun-yeong's chances of being re-elected. They attempt to appoint Dong-hun as Director Park's replacement.

Ji-an receives an offer from Jun-yeong to get close to Dong-hun. Meanwhile, Dong-hun tells his brothers that he has been nominated for the director position, and the news spreads all over town. However, Director Yun tries to intervene.

Finally, the Subway Ghost's hideout is revealed and his identity starts to come to light. Meanwhile, they find out about Ryeong's illegal tunnel investigation, making Ji-seok face the biggest crisis of his career.

Ji-an throws the slippers that she gave Dong-hun into a trash can. Senior Director Wang and his people think Ji-an is an obstacle to Dong-hun and seek to take measures. Meanwhile, Yun-hui struggles with the secret of knowing what Dong-hun knows.

While playing soccer, Dong-hun keeps replaying his conversation with Yun-hui in his head. Meanwhile, Senior Director Wang's people worry about Dong-hun punching Jun-yeong. Ji-an and Dong-hun walk home together and meet Jeong-hui and other friends.

After Dong-hun's upward appraisal, Jun-yeong feels betrayed by Ji-an and warns her. Director Yun, feeling the pressure, amps up his efforts to turn the tables. Ki-hun and Sang-hun sense that something serious is going on between Dong-hun and Yun-hui.

After interviewing director nominees, the rumor that Ji-an murdered someone in the past starts to spread around the office. Dong-hun realizes that Ji-an has fallen off the radar and searches for her, but she is nowhere to be found.

Dong-hun talks to Ji-an through his phone, knowing she could be listening, but she doesn't reply. Dong-hun asks Yun-hui if she knows Ji-an. Yun-hui confesses what she knows and decides to help Ji-an with Dong-hun, who continues to search for Ji-an.

Dong-hun takes Ji-an to the police station and asks Yun-hui to take care of her. With Yun-hui's help, Ji-an undergoes police interrogation. However, as Jun-yeong had hoped, the investigation does not seem to go in her favor.