Clara, a noblewoman raised by the strictest traditions, marries into the Duke's household - only to discover her husband has a concubine with a powerful backgroud, flirts ambiguously with his widowed sister-in-law, and despises the very nobility Clara represents. Surrounded by mansion conspiracies, a scheming concubine, and a sister-in-law who fans the flames from the shadows, Clara navigates it all with surgical precision. Her philosophy is simple - as the Duchess, she's here to clean up the Duke's messes. First, the concubine. Then, the sister-in-law. And once her position is secured and an heir is born? The next mess to be dealt with... is the Duke himself.