Peng Yun traveled to the end of the Warring States Period and became an orphan adopted by the Yin and Yang family. After she glimpsed the fate of the Seven Kingdoms at the Star Observation Deck and the new dynasty needed her to shape it, she tried to unify the world in a unique way by relying on modern knowledge and the magic of yin and yang. However, as an orphan, she faces hostility and pursuit from all sides in this troubled world where wars are rife and resources are depleted. Various schools of thought do not agree with her ideas, and divination shows that the destined king is the biggest obstacle. She was in opposition to the king's camp, but had emotional entanglements. Under the pressure of the rapidly changing situation, she not only had to deal with misunderstandings and suppression from all parties, but also had to make difficult choices between the justice of the people and the inheritance of her teacher. If you choose the righteousness of the people, use the magic of yin and yang to reconstruct the law, balance the court, and realize the blueprint of peace and prosperity to unify the world, you may lose the inheritance of your master; if you follow the inheritance of your master to extinguish the flames of war, you may go against the expectations of the people of the world. No matter what choice you make, there will be a heavy price to pay for success.