During the reign of Emperor Wu of the Western Han dynasty, the war with the Xiongnu has ended, and the whole country awaits the arrival of a Xiongnu delegation to negotiate peace. But as soon as the delegation enters the realm, a band of outlaws slaughters them all. The bandits then pose as the delegation and make their way into Chang’an, where they gain access to the halls of power. A vast conspiracy to reignite the war is set in motion. The power struggles of the era of Emperor Wu form the backdrop to this book, and every baffling case has its roots there.
It's so good! Although some of the characters weren't from the Han Dynasty, they were still very well written.