Su Wanying, the daughter of the prime minister, was forced to marry the new emperor Xiao Che, her father's biggest political enemy, who was rumored to have killed her father and brother, and was cold-blooded and cruel in order to protect her family. Everyone thought she would become a victim of political struggle and would not survive her wedding night. However, in the thin line between life and death, Su Wanying awakened the [Gongdou Deduction Simulator].
She can predict the consequences of her choices through the simulator, so she can avert danger time and time again and counterattack with precision amid the tyrant's suspicion, the concubine's frame-up, the queen mother's suppression, and the court's turmoil. She used her astonishing performance as a "predictor" to step by step from a pawn in the tyrant's eyes to his only trusted ally. When they join forces to fight against the huge conspiracy inside and outside the court, the two gradually become each other's only reliance and aspirations from political enemies who were wary of each other. In the end, Su Wanying relied on the super "spoiler" and her own wisdom to assist Xiao Che in clearing away internal and external obstacles and creating a prosperous age. She also went from being a surrogate bride to becoming the only queen who can see the world alongside him.