Substitute Marriage for a Concubine: the Palm Gu of the Paranoid Prince

She married the evil prince as a substitute for a concubine. She wanted to survive, but she was involved in a desperate situation where he was poisoned and was jealous of the royal family. From chess pieces wary of each other to a couple dependent on each other for life and death, they dance together on the tip of a knife and love each other in blood.