Shen Yan, the ruthless maidservant, has assisted the seventh prince Chu Ningyuan in his bid for the throne since childhood. In order to destroy the prince's plan to consolidate his power by selecting a concubine, Shen Yan took the initiative to match the seventh prince with the daughter of a powerful official, but Chu Ningyuan has always liked Shen Yan, who is always by his side. Shen Yan has a shadow on the love between men and women due to her tragic experience in her early years. She only has revenge in her heart, so she chooses to turn a blind eye to Chu Ningyuan's love. Chu Ningyuan's dedication to Shen Yan eventually opens up her hidden heart step by step...