To pay a debt, a married man receives billions of won from a woman. In return for the money, the man gives himself to the woman.

Seo Yi-Kyung ambitiously wants to build her own empire. She is calm and also passionate. She doesn’t believe greed is a sin. Park Gun-Woo possesses good looks and comes from a wealthy family that runs a large company. Seo Yi-Kyung is his first love and he is still in love with her. Lee Se-Jin comes from a poor background. She desperately wants to escape from her situation.

Kim Seok Joo (Kim Myung Min) is a cold, calculating lawyer who is vying to become successful at all costs. After a fateful accident causes him to lose his memory, Kim Seok Joo must rediscover who he is as a person and choose whether he will fight for justice or fall back into his old ways. Before the accident, he was engaged to the only grandchild of a wealthy family, Yoo Jung Sun (Chae Jung Ahn), but with no memory of her, he begins to fall for Lee Ji Yoon (Park Min Young), an idealistic intern at his law firm. As he regains his memories, will his heart choose new love or old greed?

Kim Young Ho is a personal trainer for Hollywood stars. Even though he comes from a wealthy family background, he suffered a devastating injury during his childhood days. Now, he overcomes his problems with patience and stubbornness. Meanwhile, Kang Joo Eun is 33-years-old lawyer. She has struggled to support her family. Now, she is overweight and challenge her-selves for a diet.