Shen Qingci, the legitimate daughter of a military family, sees her entire household slaughtered in a single night. Her father is framed for treason, and blood flows through the family estate. She escapes by sheer luck, conceals her identity, and enters the palace as a maid. Living in hiding as “Aci,” she seeks only to uncover the truth and clear her family's name. In the depths of the palace, she meets Xiao Che, a young emperor burdened by the shackles of imperial power. He appears cold and suspicious, plotting at every turn to balance the court, yet hides a loneliness no one knows about. She carries a blood feud and believes he is the mastermind who framed the Shen family, but as they spend day after day together, she develops feelings for this “enemy” that she should never have. A tangled relationship born of mistaken identity becomes ensnared in power, hatred, and suspicion. He mistakes her for a blade aimed at him and uses imperial authority to keep her at his side. Every flicker of tenderness from him feels to her like another test or scheme. She is set on revenge, yet with every clash she glimpses the struggle beneath his imperial mask and is torn between hate and love.
