A former detective turned convicted criminal becomes China's last hope to thwart mysterious invaders who threaten the empire's capital city on the day before the Lantern Festival.

Chang'an, city of Eternal Peace, is the ancient China's imperial capital and world's most magnificent metropolis. Its treasures and wealth are now under siege from a mysterious army. In 24 hours the enemies will launch a devastating attack. While the nobles panic and flee, the city's most notorious criminal will be its savior.