It seems like a simple job for Noir when they are hired by a widow to take revenge on her husband's killer. But when the job turns out to be a set-up, the tables are turned, and the hunters become the hunted. Can Kirika and Mireille hope to out-think their enemies and escape with their lives?

In exchange for a document that has a connection with the mysterious Soldats, Mireille and Kirika assassinate a Mafia Don. But the Mafia is well known for its revenge policies, and Noir soon find themselves the target of the ruthless Mafia princess known as the Intoccabile, a woman who Mireille has met long ago, and has cause to fear.

Noir and the Intoccabile still have unfinished business with each other after their last face off, and each side knows that matters can only be resolved with a final showdown. To that end, both sides travel to Sicily, where Mireille and the Intoccabile met as children. But with Kirika's arm injured and Mireille fearful and doubtful about her ability to defeat the Intoccabile, does Noir have any hope of victory? And will Mireille and the Intoccabile's past play a part in the coming encounter?