Executioner Yamada Asaemon Sagiri talks to Gabimaru the Hollow — a condemned murderer and uncannily strong ninja — who says he wants her to kill him.
Gabimaru and other criminals must set sail in search of the elixir of immortality, but limited space on the ship sparks a brutal fight to the death.
Sagiri and Gabimaru arrive on the island and begin making their way through its dense foliage, but the deadly warrior monk Keiun stands in their way.
Gabimaru and Sagiri struggle against the island's grotesque inhabitants — until a female ninja and two executioners intervene to lend a hand.
After Sagiri regains consciousness, Genji tells her to return to the mainland. The convict Nurugai and the executioner Tenza try to escape the island.
Gabimaru and Sagiri fight against the imposing Rokurota, whose sheer strength makes it difficult for them to find an opening and strike a fatal blow.
Sagiri and the others encounter a mysterious girl and her tree-like guardian, who brings them to a deserted village and reveals the elixir’s location.
Tenza and Nurugai try to flee from a strange and unrelenting foe. Just when things seem hopeless, Tenza's mentor Shion arrives to help them.
Gabimaru leaves the village and heads to the center of the island alone. He soon reaches a man-made structure and encounters a resilient adversary.
After a weakened Gabimaru offers to work together with Gantetsusai and Fuchi, Mei tries to tell them about Tao, the source of Lord Tensen's power.
Chobei learns how to miraculously heal his wounds. As Gabimaru's group tries to understand Tao through battle, a Doshi suddenly approaches Mei.
At the entrance to Horai, Sagiri and her companions realize they are facing one of the Tensen, who casually reveals a shocking truth about the island.
Unwilling to sit back and let Shion die fighting the monstrous Tensen alone, Sagiri and Nurugai jump into the fray to lend him their assistance.