As the puppet queen mother, Shen Yujing is infected with twin poisons and needs to rely on Xie Heng (envoy of the enemy country) to survive. On the surface, she listens to politics behind the curtain and secretly investigates the truth behind the sudden death of the late emperor, but is repeatedly obstructed by Xie Heng. When she discovers that the little emperor has been raised as a poison, and the antidote requires Xie Heng to trade her life for her life, she is forced to choose between revenge and love.
