The male and female leads were childhood friends, and their parents arranged their marriage when they were young. Later, the male lead’s family fell on hard times, his father died, and his mother lost her sanity. His inherited heart condition returned, but with the female lead’s help, he successfully received a heart transplant. Afterward, his personality changed drastically. The female lead inherited the family business, and the two supported each other as they rose to the height of their careers. When the truth about the heart transplant came to light, they nearly ended up divorced.
