Kang Hye Soo, a widow single mom, has a 9-year-old daughter to raise but is diagnosed with a brain tumor. Then, she is offered to be her boss Han Ji Hoon’s legal wife just for 3 months and accepts his offer hoping to leave her daughter in the care of a legal guardian. The underlying message of this drama is that money and fame are meaningless when it comes to attaining happiness, and love is the only salvation for people.