Jang Hyeon-a, the youngest daughter of a chaebol family. After graduating from a music college abroad, she lives a life of leisure. She has the money, the family, the education, and the looks, but her personality is so foul and her wits so dim that every arranged marriage prospect has run for the hills.

Fine, if it's going to be like this, I just won't get married!

Just as she proudly vows to remain single, a bolt from the blue hits her: if she doesn't marry within a year, she will be cut off from her inheritance.

"Inheritance? If they don't give it to me, I'll just file a lawsuit for my legal reserve portion."

She ignores her family's threats and continues living as she pleases, until a second trial hits. If she doesn't marry within a year, the entire family fortune—including her siblings' shares—will be donated to charity.

Feeling her life is in danger under the murderous glares of her older sisters and brothers, Hyeon-a returns home dejectedly. That's when she runs into her personal bodyguard, Guest. Well, she just needs to find a husband, right?