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.

When Kirika begins spending all her time down at the river in the company of a young painter, Mireille warns her not to get too close- after all, relationships aren't something you can pursue easily when you're in their line of work. Mireille has problems of her own, however- an old job comes back to haunt her when one of the survivors decides to put together his own mission of revenge.

It has been a decade since Mireile was forced to flee from Corsica after the murder of her family, and she has always been too afraid to return- until now. Determined to uncover the truth about her parents' murder and its connection to the Soldats, Mireille returns to her childhood home. But as she tries to stir up information from the past, she attracts the attention of those who would rather it remained buried…

For Kirika and Mireille, the point of no return has been reached. For, as Kirika's memories come flooding back, Chloe unravels the mysteries of the past for Mireille, revealing the true identity of her parents' murderer. When they first met, Mireille promised that she would kill Kirika once they discovered the truth, but now that the time has seemingly come, will she keep her word?