Jiang He, a funeral professional, transformed into a concubine. She saved herself in the mourning hall and sutured the wounds of the crown prince Lu Shiheng. The two appear to be a couple, but in fact they have their own agendas - she uses his power to break the situation, and he uses her to find out the truth about the assassination.
When the floating coffin case occurred, Jiang He opened the coffin and conducted an autopsy to find out the real culprit, but a ghost in the palace was implicated. Lu Shiheng went from probing to confessing, and the two reached a cooperation: she helped him get rid of his uncle's influence, and he gave her a foothold.
Uncle Lu Chengsi jumped over the wall in a hurry, poisoned Lu Shiheng's medicine and framed Jiang He. Jiang He used his body as bait to lure the snake out of its hole. In the end, Lu Chengsi surrendered, and Lu Shiheng inherited the title.
Jiang He became the first female widower with her coffin painting skills, and the two went from scheming against each other to sincerely dealing with each other. The coffin is the mouth of the dead, and they are each other's blades.
Purpose: Use the words of the dead to break the situation of the living