Sandara Park is a very lovely 25 year-old woman. She applied in a job to babysit a little guy. But Sandara didn't thought that little guy that she was reffering to was actually a 20 years-old man. Until her first day of her job...

Can she handle to keep her job if the guy that she'll babysit for 2 years is a tall, white, and handsome guy but cold, arrogant and jerk? But during her working days, she noticed the sudden change of her boss' attitudes towards her. 

She saw his true colors behind that cold facade of his. And she didn't notice that she was already falling to her master.