In the doomsday wasteland, the strong are respected. Mercenary Queen Shen Jin's most precious collection is a man picked up from the museum who is very similar to her dead Bai Yueguang. He is fragile, stubborn, and full of useless history and art. He is the only living comfort in her cold world. It wasn't until a natural disaster besieged the city, and powerful enemies used the codes of lost ancient books to block the way to death, that everyone was shocked to realize that the "stand-in" she treasured was itself the oldest key that could restart human civilization.