"Please marry me."

A 2 billion won contract offered to a private military company's mercenary.
The condition is one year of marriage.

"Customer, are you perhaps crazy?"

"You're the only lunatic that's fine with having a divorce history."

Lee Raehwa, the only daughter of Daesan Construction.

In order to break free from her father's control and complete her painting,
Raehwa hires a legal guardian for one year.

But the only hope she hired, Gwon Itae, was unpredictable and crazy person

The marriage and cohabitation, started as a contractual relationship,
take an increasingly strange turn...