The series follows Namgung Ho and Lee Mi-do, a couple in a 10-year relationship whose once-burning passion has matured into a quiet trust. Ho is a sociable man who wins people over within minutes and believes marriage is the natural next step in their relationship. Mi-do, a film director devoted to her work, finds her heart swayed by another man during a difficult period in her career. As their relationship begins to falter, they are forced to confront a difficult question: should they move forward with marriage or finally choose a love other than each other’s?