The wandering physician Ye Ping An, entangled in an old and secretive case, arrives in Chang'an. Accused of mystical medical interventions, she manipulates minds and evokes fear, while the low-born magistrate Yuan Shao Cheng, craving power, seizes the opportunity to rise. A murder in Chang'an implicates Ye Ping An, but is she truly an innocent scapegoat or a mastermind plotting revenge? The first move in her intricate scheme has already unraveled.