Action anime series takes place in 1864, several years before the Meiji Restoration. After their parents were killed, and two brothers Tetsunosuke Tatsunosuke Ichimura come into the Shinsengumi, samurai regimentcreated to preserve order in Kyoto and support Tokugawa Yoshinobu, the last shogun in Japanese history. Unlike his older brother, Tetsu Ichimura continues to think about revenge and wants to become strong. But he was only 15 years old, and the Shinsengumi he was only a servant. His exasperated attitude of others, but over time it begins to doubt,that should be the same cruel and cold-blooded killer, as the Shinsengumi samurai.