Given up on becoming a pro board game player, Jang Geu-rae is now an intern struggling to handle corporate life, reliant on his coworker Ahn Young-yi.

Working alone after hours, Geu-rae finds he is isolated from his coworkers despite his boss’s advice on teamwork. Talks of a co-presentation come up.

Geu-rae is left to do all the work when he partners with Han Seok-yool. Kim Dong-shik faces disciplinary action for an issue involving product export.

Geu-rae and Seok-yool stumble in their presentation speech but still impress in their engagement of ideas. A week later, Geu-rae waits for results.

When important materials go missing, Section Chiefs Oh and Chun get into an argument. Young-yi cries after being unfairly scolded by her boss.

After learning that the client is his old schoolmate, Oh is certain the deal will go smoothly, until he is made to wait and pay for a high-end club.

Geu-rae is uneasy when Oh chooses a risky project at a team meeting. Young-yi is ordered to get approval for a project that Finance already rejected.

Oh is given the lead on a project recommended by the IT Sales division. He can hire more personnel if successful, but the client refuses to meet him.

When Park joins the 3rd Sales division, he mocks and overworks Geu-rae. It turns out Geu-rae’s coworkers have also been struggling under the new boss.

After Park sexually harasses an employee, Oh declares that he cannot work with him. Oh realizes something after looking at a project Park recommended.

After revealing Park’s misconduct, Oh is promoted to deputy manager. The 3rd Sales division’s new chief is Chun Kwan-woong, who intimidates Geu-rae.

Restarting Park’s used car export project, the 3rd Sales division faces opposition. When the Director shows interest, they must give a presentation.

The CEO attends the used car export project presentation, which is a success thanks to Oh’s unusual style. The CEO praises Geu-rae for this proposal.

Geu-rae once again remembers that he is the only intern among his peers. He asks Oh if he can become a permanent employee.

Geu-rae continues to work diligently despite learning he can’t become a permanent employee. He goes to town with Baek-gi on an assignment from Oh.

A year and five months after being hired, Geu-rae’s proposal finally gets approved, but Oh is told to remove him as head of the project.

The Director offers the 3rd Sales division a major project, but Oh is suspicious. Kim Dong-shik gets into an argument with coworkers who insulted Oh.

Oh decides to accept the Director’s proposal, but the team quickly runs into difficulties. Kim and the others suggest to withdraw, but Oh is not sure.

After the turmoil, the 3rd Sales division finally returns to normal. A new boss arrives with new methods. Meanwhile, Geu-rae’s contract nears its end.