On the night the shogunate's treasury was breached, the guard Utsugi had already been taken down. His colleague Ryunosuke felt responsible and decided to catch the culprit, not only for the sake of the beautiful wife of Utsugi, Chika, but also for his own honor. Chika's younger brother Shinjiro and the powerful Uechi family living near Ryunosuke's abode, join hands to support Ryunosuke. Counterfeit coins begin to surface—a scheme by the corrupt faction led by Yanagisawa. The henchman behind this is Koyamada Tesshin, who gathers ronin to amplify Yanagisawa's power. Among those ronin is Tendo Sakon—a man who drinks silently and plays the flute when in a mood.