There are thieves who come from different backgrounds and situations, but were not born as thieves. For the most part, they lived by the rules even while growing up poor and worked hard to better their lives. They are actually generous people. But the cruel realities of society have pushed them to the edge. And to ensure that their past problems do not hamper their own children, they fight to exact revenge from those in power, search for their long-lost family members and commit one last heist to mete out justice. This TV show will entertain viewers with a story revolving around thieves from the low rungs of society who burglarize the home of powerful men in order to unmask them. They do this to put an end to those who stand above the law and get away with thievery scot-free.

A secret royal inspector works as an undercover official who inspects local provinces to expose corruption. He teams up with a lady who is searching for happiness by getting divorced with her current husband. The duo then go on a grand scheme to discover the truth and find corruptions.

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.