Having gone into business as Noir, Mireille and Kirika take on their first job together- the assassination of a far right terrorist and his collaborator in the Peace Department.

The mysterious Chloe has one last mission to carry out before she goes home to Altena and the manor- she has been ordered to kill an old NATO intelligence officer. As she journeys to Switzerland to carry out her task, Chloe finds that she is not the only one who has been sent to kill Reimann, and that she may have to protect him if she wants to be the one to eventually take him out.

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…

Two maidens loyal to the Soldats, tested through trial, and appointed by ancient ritual- this is the true nature of Noir. As Altena recounts the history of the Soldats, the Council itself plots to move against her, and her idea of recreating Noir. Meanwhile, Chloe eagerly awaits as Kirika faces one last trial, hoping that the two of them will indeed prove worthy to become the next incarnation of the true Noir.

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?