Noir features the story of two assassins, one seeking vengeance for her family's murder and the other searching for her lost identity. The pair, Mirelle and Kirika, team up to form a team called 'Noir'. However, by doing so they attract the attention of a powerful and mysterious group. And, as if that wasn't enough, they must also contend with a mysterious woman who claims to be the 'True Noir'. Mirelle and Kirika must go on a 'pilgrimage to the past', each coming to terms with the half-forgotten events of ten years previous. Beyond the gripping mind-bending mystery, the plotline also focuses on the relationship between the two women. Though they begin their partnership with some degree of reluctance, the pair soon grow on one another. How their friendship stands the test of time awaits...