In her past life, Marquise Selena was tormented by the cherished legitimate daughter of the Marquis household and chose to die alongside her. Reborn, Selena no longer blindly favors the daughter and instead protects the dutiful concubine daughter who once risked her life for her. Meanwhile, the love-struck legitimate daughter is determined to marry Prince Jayden, but Selena soon realizes it is the concubine daughter who truly holds his heart. Taking matters into her own hands, Selena orchestrates their royal marriage. The spiteful legitimate daughter conspires with the matriarch to sabotage them, but Selena foils every scheme, and the two eventually reap the consequences of their actions. Selena succeeds in uniting the concubine daughter with Prince Jayden. Years later, her husband, long thought dead in battle, returns, and the reunited couple grows old together in peace.