Twin sisters, mistaken identities, and a love born of substitution: the hero’s life-saving debt is claimed by the heroine’s own sister, setting the stage for the ultimate substitute-love plot and deadly game in the imperial harem! While gathering herbs in the mountains, Wang Wanning rescued the hero, Chi Huai, who had been poisoned. His true identity was the emperor. When he awoke and wanted to repay the woman who had saved his life, fate intervened: the heroine’s twin sister was there instead. Mistaking her for the heroine, he promised her the position of empress, and the scheming twin took credit for her younger sister’s deed.