Lin Feng, a modern young man, travels back to the Nara period of Japan because of an ancient jade with a chrysanthemum pattern passed down from his family. He becomes Emperor Kanmu (formerly known as Prince Yamabe), a young emperor who is trapped in the political whirlpool and is like a puppet. Relying on the "prophet" of the historical context and modern thinking, Lin Feng (Prince Yamabe) tolerated the plan in the crisis-ridden palace. He dealt with the powerful Fujiwara clan, the covetous local tycoons and the brothers who coveted the throne. He experienced assassinations, coups, curses and wars. From moving the capital to Nagaoka Kyō and Heian Kyō to get rid of the control of the old forces, to establishing an envoy to consolidate imperial power, he gradually grew from a chess piece at the mercy of others to a true supreme ruler in charge of the world. However, when he finally reached the pinnacle of power, he discovered that the curse of the "Eternal Lineage" was far from over. New challenges and deeper secrets were hidden in the lines of the bloody chrysanthemums...
