An e-mail containing the words "Make a pilgrimage for the past with me", accompanied by a strangely familiar tune, lure professional hitwoman Mireille Bouquet into meeting with Kirika Yumura, a Japanese amnesiac with amazing killing skills. Could the mysteries of Kirika's lost memories shed some light on Mireille's own past?

Having asked her old friend Vanel to find information on the people who are trying to kill Noir, Mireille is shocked to discover that whatever he has uncovered has cost the lives of him and his entire family. Realising that Vanel must have been onto something important, Mireille begins her own investigation to find out the secret that cost her friend his life.

Ten years ago, Mireille left Corsica with her uncle Claude, who looked after her and trained her as an assassin. Now, Claude has returned to Paris, but Mireille's delight at seeing her uncle again is tinged with doubt. An assassin of Claude's calibre is bound to have secrets of his own- secrets that could spell trouble for Noir…

Kirika and Mireille's mission to destroy the Hang Yiban triad went awry when the Hang Yiban sent their own assassin- the ruthless Shaoli, to destroy Noir. Now, Mireille has been captured by the Hang Yiban, and Kirika must work with the mysterious Chloe to free her. But even if Mireille can be rescued, Noir still has the job of eliminating both the Hang Yiban leaders, and Shaoli herself…

Kirika and Mireille's partnership has come to an end, and with no place to return to, Kirika finds herself wandering through the wilderness. Found and rescued, she is taken to what seems like a simple country village. Yet when Kirika realises that all the villagers not only recognise her, but have been expecting her arrival, it becomes clear that all is not as it seems.

Mireille and Kirika have overcome everything that the Soldats have thrown at them, and proven themselves truly worthy of the name Noir. But there is one last piece of business they must take care of at the manor- a final face off with Altena, the woman who has been manipulating their lives from the very beginning. But will this showdown set them free, or is it just the last move in Altena's game?