Japan, 1701. A group of samurai become rônin after their lord is forced to commit seppuku for assaulting a court official, who will become the target of a merciless revenge.

Set in the 1860s, the final years of the Tokugawa Shogunate, The Fireflies focuses on Tose (Awashima Chikage), the mistress of the Teradaya, a small inn in the Kyoto suburb…