With Lord Ieyasu calling Ogen and Danjo - leaders of the Iga and Kouga ninja clan, to demonstrate each elite ninja own abilities. Impressed, Ieyasu declares the battle against the clans to determine the next Shogun.

After the death of both Ogen and Danjo, not knowing they died, Gennosuke and Oboro are planning their wedding that could unite and bring peae to the clans. However, the Iga clan looks forward to the war against the Kouga clan after getting a scroll.

Thinking peace will soon come, Gennosuke and Udono celebrate with Oboro and the Igas. However the Iga clan plans to assassinate Gennosuke and Udono during the feast.

The Kouga clan are concerned with Gennosuke stating at Tsubagakure, even they were informed about the peace treaty. They weren't informed about the war that has arise between the clans. Saemon decides to send his younger sister, Okoi to find Gennosuke.

As Rousai pestifers Okoi to find out the fighting abilities of the remaining Kougas alive, Koshiro is sent to tell Oboro that she must meet up with Tenzen. However, when Saemon is able to get into Tsubagakure in the disguise of Yashamaru, what he sees will be the most horrible thing in his life.

With the scroll now in Gennosuke's possession, he makes the decision to either engage in war or not. However, with being attacked by Koshiro and the other deadly ninjas, Gennosuke may have a hard time getting out of the village.

Two woman who hate each other and a little boy could possibly be linked to why the Iga and Kouga hate each other this moment..

Gennosuke returns the scroll to the Iga and issues a challenge that if they attack the Kouga village they will annihilated. The people left can travel to Sunpu and join them. Tenzen accepts the challenge

As the Kogas continue their journey to Sunpu, Oboro's hawk flies by carrying a scroll. While two ninjas pursue the hawk, Tenzen makes his move only to find something he did not expect.

Kagero sets out to kill Oboro, after telling Gennosuke that she killed her wanting gratitude. She however gets caught in a trap caused by Tenzen.

Oboro issues out a challenge to draw Gennosuke out from hiding. Meanwhile, with Kagero captive Tenzen tortures her with needles. Gennosuke finally arrives.

With Tenzen defeated, Gennosuke carries Kagero away. However wanting to be with him she tries to kill him with her poisonous breath. Oboro's eyes are finally open.

The last battle between the Kouga and Iga, determining who will inherit the title of Shogun. Oboro and Gennosuke face each other for the last time.