Three single women in 30s gather and talk about everyday life from work to love. Nothing is more important to them than enjoying a drink after work.

During the Joseon Dynasty, the Secret Royal Inspectors are the eyes and ears of the king. They travel the provinces undercover and listen to the plight of the common people, investigating abuses and corruption of government officials.

The story centers on thieves who strike against people in high power who try to control Korea.