There are three famous families in the ancient Karen Empire - the Lancaster family, the Hannover family, and the Spencer family. The three families stand as tripods and work together to protect the vast Karen continent for the royal family. A peaceful life on the surface, but secretly extremely turbulent. The relationship between the three major families is rigid and they are at odds with each other, especially the relationship between the Lancaster family and the Hanover family. But the youngest daughter of the Hanover family volunteered to work as an assistant for the abandoned son of the Lancaster family... When the relationship between the two gradually sprouts, will a bright future await them, or will it be a bigger conspiracy?