Lone Wolf and Cub, Volume 18: The Last Kurokuwa

The Shogun himself has given Retsudo a stern warning: do something about Itto Ogami, the Lone Wolf, or the Yagyu clan will fall out of favor. Now Retsudo must turn to the Fire Watchers, a select band of warriors, for help--as well as the last surviving members of the legendary Kurokuwa ninja clan!