When Yong Jui, the newly appointed Zongling of the Zongren Mansion, checked the royal genealogy (jade certificate), he found that three consecutive generations of descendants of a distant branch of the clan were recorded as "died in infancy". His uncle and predecessor Lao Zongling's last words were like thunder: that was not a premature death, but a "child change" - swapping with folk babies to prevent being involved in the disaster of taking over the legitimate children. A page of cold genealogy, three erased royal heirs, and a dusty bloody secret. Yong Hui was forced to step into the fog, between palace rules and blood, loyalty and truth, and faced the most treacherous shadow under the imperial power.
