Gabimaru, a ninja member of a clan of assassins, is sentenced to death. He claims to have nothing to tie him to life, yet no method of execution manages to end his life. His meeting with Sagiri Yamada Asaemon, who seems to be investigating him, will change everything.

Gabimaru and Sagiri are in trouble during their first fight against the island's mysterious creatures. Gabimaru is unaware of these monstrosities and this puts him at a disadvantage in battle. The sudden arrival of Yuzuriha, the female ninja, will change the situation, but Gabimaru does not see clearly in her game.

Rokurota starts to cause serious problems for Sagiri and Gabimaru, and now they must think of a strategy to defeat him!

Sagiri's group sets off in search of Horai. Gabimaru goes ahead and encounters the same powerful being that confronted Tenza...

Chobe brings new abilities to bear as he faces the Tensen's servants. A secret of Mei's is revealed to Gabimaru, hardening his resolve to fight and opening him up to a new perception of the world.

Sagiri's party faces Mu Dan's seemingly unstoppable true form. Shion does his best to rise to the challenge with his mastery of waves.