Tokyo, 1869. It is the dawn of the Meiji era in Japan, but the scars of the recent civil war are yet to heal.

The new regime struggles to keep the peace as old scores are settled and dangerous new ideas flood into the country from the West.

A new police force promises to bring order to this land of feuding samurai warlords, and chief inspectors Kazuki and Kawaji are two of its brightest stars. Together they investigate a spree of baffling murders across the capital, moving from dingy drinking dens to high-class hotels and the heart of the Imperial Palace. Can they solve these seemingly impossible crimes and save the country from slipping into chaos once more?