Song Young-Dal and Jang Ok-Boon have been married for many years and they have 4 children: Joon-Sun, Ga-Hee, Na-Hee and Da-Hee. Third child Na-Hee is a doctor and she works with her husband Doctor Kyu-Jin at the same hospital. They fell in love during their medical school days and got married, but their marriage life is not doing very well. Meanwhile, the first child Joon-Sun and the second child Ga-Hee are both divorcees and live with their parents. The youngest child Da-Hee struggles as an intern at a company.