The alliance between the Song and the Mongols to destroy the Jin was the greatest strategic mistake committed by the Southern Song dynasty. If the negotiations between the Song and the Mongols had failed at that time, how would history have unfolded?

This book assumes that a chance event leads to the failure of the Song-Mongol alliance negotiations to destroy the Jin, and from then on, history is changed.

The protagonist of this book, William Thompson, is a descendant of a fallen branch of the Tang imperial clan. After the city falls, the fourteen-year-old is taken captive to the Jin state and becomes a slave. After many twists and turns, he regains his freedom and returns to his homeland's capital, Lin'an, gradually becoming a merchant. By a stroke of fate, he poisons the Mongol deputy envoy who came to negotiate the alliance to destroy the Jin, causing the negotiations to fail. From then on, history takes a wrong turn, and the fate of William Thompson himself is also changed.

This book tells the legendary story of a young man rising from slavery to become the founding emperor.