"Higher Than The Sky, Thicker Than The Earth" ponders the conditions for a happy family through the contrast of two families. One family has no social status and lives in hardship. Each member of the family has their own little flaws, so they often quarrel, but they trust each other, care for each other, and uphold the harmony of the family; the other family has high social status and economic power, but has lost the trust and love between husband and wife. However, due to identity issues, they have to maintain a family on the verge of breaking up, and eventually become a truly happy family. This drama is led by Han Hyo-joo, and fans who like Miss Hyo-joo can feast their eyes.