Elena was once the sharpest blade in the empire, but due to an accidental amnesia, she was used by the Duke's family as a substitute for the deceased eldest daughter. She is optimistic and lively by nature. Even though she is a mute and in a difficult situation, she is still the "happy fruit" of everyone. The scheming sister-in-law Vivian regards him as a thorn in her side and presses her step by step for revenge. In life and death crises one after another, Elena's God of War instinct awakens. Although she has no system to join her, she uses absolute force to abuse the scum. The empire's commander-in-chief, Kane, who has always pursued "caution first", gradually became attracted to her optimism while observing in secret. He finally let go of his guard and turned on the overbearing and protective mode to help her return to the peak of glory.