It seems that the girlfriend of Ian’s biological older brother, who is about to get married, is having an affair with a coworker.
To secure concrete evidence to stop the wedding within two months, Ian disguises herself and gets a job as the secretary to the CEO of the company where her future sister-in-law works.

“Do you think boundaries exist just so you won’t cross them?”

The CEO she ends up serving, Cha Jeonghan, constantly gets under Ian’s skin with his handsome face and utterly terrible personality.

“Yes, boundaries exist to be crossed.”

With no fear of being fired, Ian decides to cross Jeonghan’s boundaries however she pleases.
And that arrogant man who thought he was untouchable…

“Did you put on makeup today?”
“What?”
“It looks like you’re wearing lipstick.”

His attitude suddenly changed?