Yi Xinyao, a gentle blind musician who sees souls in sound, is given as a political bride to the monstrous Duke Li Youcheng—a man whose battle-scarred face matches his ruthless reputation. Yet when her fingers trace the cracks in his armor (literally and otherwise), she plays melodies that unravel the darkness swallowing him whole. In a court where everyone fears the "Beast," only the woman who cannot see him dares to whisper: "I know you."