Blade of the Immortal: Vol. 15: Trickster

Kidnapped and bound by three Itto-ryü warriors, Rin is unable to warn her bodyguard Manji, the immortal swordsman, that he's heading into a trap. To make matters worse, the Itto-ryü possess a large dose of kessen-satsu, the only poison known to damage Manji's blood and severely cripple his regenerative abilities. And is Mugai-ryü assassin Giichi following Manji in order to help rescue Rin ... or will he just stick around long enough to finish off any survivors?