Despite Na-eon's continued success in securing significant marketing deals, she finds herself bothered by an intern named Eun-ho. Despite being just an intern, Eun-ho consistently disrupts Na-eon's routine. Frustrated, Na-eon decides to confront Eun-ho in an eerie location, possibly indicating that she has reached her limit.

Eun-ho, oblivious to the gravity of the information he stumbled upon, feels compelled to share his discovery with Na-eon. However, her reaction is unexpectedly calm, contrasting with his anticipation. Despite the unsettling nature of what he witnessed at the factory, the collaboration between XU Beauty and Seongsu Agency proceeds seamlessly, leaving Eun-ho bewildered by the apparent ease with which the project advances.

The Na-eon's XU Beauty event unfolds seamlessly, garnering a positive response from the public. Yet, what appeared to be another flawless project marks the onset of Na-eon's significant downfall. The morning after, she encounters an entirely new disaster, and the solution she believed would pave her way out unexpectedly places her in grave danger.

Na-eon wakes up in the hospital, trapped in Eun-ho’s body. To figure out exactly what happened, she continues living Eun-ho’s life and realizes that at Seongsu Agency, he has been assigned to Team Underdog, a team full of troublesome employees that is led by none other than Yoo-mi.

Na-eon, who is in Eun-ho’s body, starts to organize Team Underdog to get to work. However, her efforts are stifled by Yoo-mi’s plans to keep Eun-ho in check, which deepens the war of nerves between Na-eon and Yoo-mi. Meanwhile, Na-eon thinks about how a soul swap between her and Eun-ho could have occurred.

Being trapped in Eun-ho's body, Na-eon is trying hard to track down the person who tried to kill her. After hearing from Dong-beom, she suggested making big-size shoes for drag queens, and it was a huge success. Meanwhile, Na-eon receives a call from the hospital, and she sees the guy with the rabbit mask there.

In a TV interview, Yoo-mi claims that Na-eon simply took a fail and she didn't commit suicide because of the company. Meanwhile, Na-eon wakes up from a coma. In order to switch the soul back, Eun-ho suggests kissing each other.

Eun-ho, who is trapped in Na-eon's body, returns to Seongsu Agency and becomes the manager of Team Underdog. The team is given a project to work on while Eun-ho and Na-eon try to figure out the culprit behind their incident.

Team Underdog continues to work on the Girlish branding project and prepares to open a pop-up store. However, Team One of Seongsu Agency tries to get in the way and ruin the project. Meanwhile, Na-eon and Eun-ho think of ways of evade Team One's attempts.

Yoo-mi goes to check out Na-eon's pop-up store. She expected it to be shabby and a failure, but the store was a huge success, and Na-eon's team even saved up a lot of budget. Feeling frustrated, she goes to meet someone who has been behind her, and Eun-ho follows her. Meanwhile, Yoo-mi tells Eun-ho about an upcoming project.

Eun-ho accepts the new project, and while doing so, Team Underdog also gets a chance to compete. Na-eon and her team go out for market research, and they run into Jenny. Meanwhile, Eun-ho asks Yoo-mi to make an appointment with Nam Yoon-hyuk.

Both Yoo-mi and Na-eon are working hard on the rebranding project. Inspired by Jenny, Na-eon comes up with an innovative idea. Meanwhile, Yoo-mi has a secret weapon for her project, and that is Yoon Nam-hyuk, the sexy symbol of this generation.

Seongsu Agency and Segye Group are in the headlines of a scandalous situation because of Yoon-hyuk, the soju model of Yoo-mi's rebranding project. Yoo-mi is done for, and Na-eon's non-alcoholic drink concept has become a huge success.

Eun-ho gets a mysterious message and he goes to the restaurant that is mentioned in the text. He sees Director Han there. All of a sudden, both Eun-ho and Na-eon have a serious headache, and their souls get switched back. Meanwhile, Na-eon finds out that Director Han is the guy behind Yoo-mi.

Na-eon becomes the manager of Team One for her successful rebranding of Segye Soju. She assigns new projects to the teams, and she takes the HQ Motors project which will lead her to Director Han. Meanwhile, Team Underdog is in charge of rebranding an old motel building.

Sun-ho and Na-eon switch souls whenever they hear a particular sound of a wind chime that gives them a headache. Meanwhile, Na-eon finds Eun-ho suspicious as she sees the messages he got from Director Han.

It turns out that Eun-ho works for Director Han in order to know the truth about an incident that happened five years ago. Na-eon feels frustrated. She meets Eun-ho at Mangyeon Temple, and Eun-ho gives her a week to reveal the truth. Meanwhile, there's a strange warning on the company's bulletin board.

Da-eun, Eun-ho's girlfriend, had a talent for making candles. Five years ago, Na-eon and Eun-ho bumped into each other accidentally at Segye Group, and their materials for branding presentations got mixed up. Just like that, Da-eun's ideas of Bandi Candles were in Na-eon's hands and Na-eon turned Da-eun's ideas into hers.

Yoo-mi overhears the conversation between Na-eon and Eun-ho. She finds out the secret that they went through a soul switch and wants to use this secret to bring down Na-eon. Meanwhile, Na-eon wants to find out what evidence Director Han has in his hands. In order to do that, she will have to secure the deal with HQ Motors.

Segye International and Seongsu Agency are up for a big match. Before the presentation, Eun Ho gives something to Na Eon, and Na Eon reveals that Director Han has stolen High Jet’s idea. They join hands to bring down Director Han. Meanwhile, Eun Ho discovers a shocking clip from his hard drive.

Na Eon holds a workshop, but Eun Ho refuses to join. Eun Ho can’t forgive himself for blaming Na Eon the whole time and he decides to resign. Meanwhile, Na Eon confesses to Eun Ho. They decide to find the person who tried to kill Na Eon together.

The evidence of Jung Woo trying to kill Na Eon is now in Na Eon’s hands. She makes Jung Woo confess and it was Hee Jung who was behind everything. Meanwhile, Na Eon and her team are going to make Hee Jung do something bad and get new evidence.

At Hee Jung's inauguration, Na Eon reveals the ultimate truth. Hee Jung and Jung Woo are arrested for their wrongdoings. Meanwhile, Na Eon becomes the new CEO of Seongsu Agency. However, Eun Ho wants some time and disappears.