Kim Yooseul was prepared to take over Kim Yeon Soo also known as his father's company which is Pledis Entertainment. 

Yooseul had been studying abroad in Canada since she was in 6th grade and she had turned 19 last month and it's time for her to go back to Korea.

Without doubt, she hated going back and she was going to pursue her own career as a chef. But then Yooseul just had to follow her father's order. And so, she was told to be 'undercover' as an intern in Pledis Entertainment. Managing the idols schedules, taking phone calls, supervising the idols' practice, and making sure everyone didn't know her true identity; the CEO's daughter who was taking over the company. 

Yooseul was pissed since everyday she had to face the true colors of their idols behind camera. She realized they acted pretty differently when the camera's on and off. And one guy from one particular newly debuted boygroup, nearly caught her off guard.

It all started with a single accident, and it grew larger and larger until...

something unexpected happened.