"Midas" takes place against the backdrop of corporate M & A (mergers and acquisitions).  Kim Do-Hyun (Jang Hyuk) graduated from the top university in South Korea and has now worked as a fund manager for 3 years. He is handsome and good at sports. Do-Hyun is particularly keen with analyzing the situation as it occurs, but his weakness comes from his poor family background. After working 3 years as a fund manager Do-Hyun is all too aware the power money has. Insecure with his situation, Do-Hyun decides to look for a more prestigious job, with better pay.Yoo In-Hye's (Kim Hee-Ae) is a president for a hedge fund company. Her grandfather was a banker during the Japanese occupation of South Korea. This means her grandfather was on the side of the Japnese. During the Korea War he made lots of money. After the war her grandfather became a money lender and through this made a fortune. By the 1970's he became the most powerful man in the underground economy. Yoo In-Hye's family is now one of the richest families.Lee Jung-Yeon (Lee Min-Jung) dated Do-Hyun for 6 years and they will get married soon. Whenever she thinks about Do-Hyun, she can't stop smiling. During her middle and high school years Jung-Yeon was a quiet student with ordinary scores, but Do-Hyun appeared in front of her and they began a relationship. She is certain that Do-Hyun loves her. Jung-Yeon also has one thing that Do-Hyun does not have. That is a family.