Jiang Hao traveled through the book and became the villainous prince who was bloodbathed by his reborn sister. Faced with the newly recovered but scarred "Blood Moon" assassin, he was determined to reverse the outcome of his family's annihilation. But my sister's sword was sharpened for revenge, and her heart was left with a twisted mark by Helian Jue, the commander of Beidi. Jiang Hao protects her amidst court intrigues and border wars, and also wants to separate her from her dark dependence. When the healing of family ties encounters the shadow of sadomasochism, can he lead her out of the bloody past, so that the moonlight of Jingbei Palace can finally illuminate her reunion?