- Modern deliveryman Long Yifei suffered a car accident and woke up with a severe headache. He found himself in an antique palace and received the memory of the original owner: the original owner was also "Long Yifei", the younger brother of Long Xiyao, the empress of the Great Xia Dynasty. He had no right to inherit due to his cowardice. The original owner and the two previous princes were suspected of being poisoned. The mastermind behind the scenes pointed to the prime minister who coveted the empress and imperial power.
- Long Yifei understands the situation: there are traitors in Daxia, gangs are spread throughout the six tribes, there is Great Yan outside, and the Wei Dynasty is eyeing him. He has no "golden fingers". The only hope to break the situation is to use modern knowledge to develop gunpowder.
- Long Yifei secretly observed the situation in the palace, confirmed the arrogance of the Prime Minister's gang, and at the same time tested the attitude of the Empress Long Xiyao, showing a calmness that was different from the original owner, and initially gained a trace of the Empress's trust, paving the way for subsequent requests for materials.
