Gensai reports to Hakuunsai that there are now no more spy samurai in Edo. Gensai is doubtful when he is told that the Black Ninja will leave Edo when their lord does as he swears on his sword he wants to kill Shintarō himself because of all the ninja he has killed. Shintarō and Tonbei decide to capture a Black Ninja to extract information from him. Yūzō and two other ninja attempt to assassinate Shintarō but are tricked by Tonbei. He captures one who is killed by Gensai, and impersonates another. Gensai realises they have a spy in their midst and Tonbei is captured. Shintarō sends Shūsaku to safety and goes after Tonbei and fights with Gensai. Shūsaku follows. Gensai threatens Tonbei with his sword, forcing Shintarō to drop his sword. He then taunts Shintarō with cutting off his ears, nose, etc. while Shūsaku retrieves the sword and cuts Tonbei loose. Gensai retreats. Tonbei, Shintarō and Shūsaku set off for Oshi Castle in Musashi Province, home of the Abe clan, some 200 miles away.
