Law graduate Baek Seung-chan begins his first day as a producer-director (PD) in KBS' variety department and finds that his college crush is infatuated with a senior PD, Ra Joon-mo. Joon-Mo's friend and fellow PD, Tak Ye-jin, helps to train the new recruits as she deals with a temperamental starlet, Cindy, who refuses to cooperate with her on her program.

Seung-chan is assigned to the '1 Night 2 Days' variety program headed by Joon-mo, who is struggling to relay the news of recasting to his current cast members. Ye-jin negotiates with Seung-chan on the repayment of his father car's repair bill and deals with the aftermath of Cindy's actions on her show.

The '1 Night 2 Days' team brainstorms ideas for the new season. As the team tries to find a replacement for their last cast member, Seung-chan suggests Cindy, who considers his request with interest. Meanwhile, Ye-jin is elated to learn of Joon-Mo's break-up with his girlfriend.

After spending the night at Joon-mo's apartment, Seung-chan reveals that he knows Joon-mo and Ye-jin are living together, making Ye-jin worry that he might gossip about them at work. Cindy joins '1 Night 2 Days' as the new season begins.

The first shooting of the new season ends for the '1 Night 2 Days' team with a celebratory dinner, which Ye-jin decides to join. While drunk, Ye-jin confesses her feelings to Joon-mo. Meanwhile, the '1 Night 2 Days' team begins the editing process of their first episode.

Ye-jin reveals to Seung-chan about her deep friendship with Joon-mo; she decides to move out of Joon-mo's apartment after her accidental confession. Cindy's infatuation with Seung-chan grows as he helps out at a music concert special.

Cindy stows away in Seung-chan's car after being discharged from the hospital. Feeling guilty about causing Cindy's injury, Ye-jin decides to help her hide in Joon-mo's apartment. Cindy's agency deals with the media as the public becomes intrigued by her disappearance.

After revealing her past and feelings to Seung-chan, Cindy celebrates her birthday with him, Ye-jin and Joon-mo. The '1 Night 2 Days' team films a best-friend special as the network's variety department gets ready for their annual sports event.

Ye-jin remains oblivious to Seung-chan's feelings for her that is apparent to Cindy and Joon-mo. The '1 Night 2 Days' team deals with being pre-empted for a week in favor of a new show. Cindy faces the possibility of being replaced as her agency insists that she help promote their new recruit.

As Seung-chan struggles to create a preview for the next episode, he realizes Cindy's feelings for him. Cindy finds herself gaining new allies in her anti-fan and fan groups as she continues her power-struggle with her agency CEO. Ye-jin discovers Seung-chan's feelings for her.

Ye-jin processes Seung-chan's confession as she moves out of Joon-mo's apartment. Joon-mo is deflated that his program is not performing as well as the new show. Meanwhile, Cindy is betrayed by her agency CEO who sets up a career-ending interview to ruin her image.

Despite facing possible cancellation and public outcry due to the recent scandal created by Cindy's agency CEO, the '1 Night 2 Days' team continues filming their season with Cindy. Meanwhile, Ye-jin discovers a way to help Cindy and finally realizes Joon-mo's feelings for her.