The killer Chi Wu of Ksitigarbha Palace was poisoned for ten years and was controlled by the palace owner Feng Louyu. She was ordered to assassinate the prince, but was ordered by the regent Pei Ji to kill him within a month. Disguising herself as a concubine, she sneaked into the palace and lurked closely. Faced with repeated temptations from the suspicious Pei Ji, she gradually developed feelings for each other while risking her life to protect him. Chi Wu found the antidote and got out of control, and teamed up with Pei Ji to get rid of Feng Louyu and take charge of the Ksitigarbha Palace. When the two were deeply in love, the enemy who wiped out the Pei family returned and the turmoil started again.
