The end of a banquet brings the beginning of a marriage. Is it the family mission, or is it because she is heartless and has a body like duckweed... She still married him. While everyone lamented her sacrifice, she knew that with his power, she would get closer and closer to her goal. The mark left in her heart ten years ago changed her life. Ten years ago, she couldn't protect the person she loved most, but ten years later, she wants to hurt everyone who loves her. The loyal and ambiguous protection of her best friend, the dedication of her husband without regrets, and the "rival" who appears as a rival but protects her domineeringly and tenderly. When the crisis left over ten years ago gradually emerges, can she survive it safely? When the black curtain slowly falls, what kind of betrayal and abandonment will she face...