[Taken From AnimeNFO]

Noir is an anime set in the near future. Mireille is a young girl, a lone-wolf type who happens to be one of the most talented assassins in the underworld. One day she receives an e-mail with the name of her next target: Kirika Yumura. The e-mail has an attachment phrase, "Join me on a pilgrimage to the past." and a melody that was playing from a music box when Mireille`s parents were killed. Mireille, whose parents were killed by a mysterious assassin, and Kirika, a girl who has no memory of her past, eventually team up together as assassins. Noir will emphasize plot and story, rather than flashy gunfight sequences and big explosions.