This drama follow the lives of two young sisters as they grow from children to adults. They each face many twists and turns before achieving true happiness.

Three Families Under One Roof is a drama set in an urban alleyway residential area. With a total of 413 episodes. It is called a national drama and a drama for the common people along with 'Country Diary'. The drama depicted the common atmosphere of the residents living in a residential area in an alley, with the themes of conflict, division, forgiveness, reconciliation, and harmony as well as harmony and harmony among them as they came to live under one roof.