Mireille, an assassin, receives an email from Kirika, an amnesiac girl. After Kirika disposes some gunmen who ambush them, the two women team up under the codename Noir.

On their first assignment, Mireille and Kirika track two terrorist. The mission takes an unexpected turn when their targets are tipped off.

A woman hires Noir to kill the man she suspects murdered her husband. The duo's skills are tested when the lights go out in an empty hotel.

Kirika and Mireille hunt down members of a faction that sabotages unstable countries. The Uligan army unexpectedly arrives at the Noir hideout.

When a friend and his family turn up dead, Mireille and Kirika follow clues that lead to the catacombs of a cathedral - where an ancient book reveals their enemy's name: the Soldats.

While in Russia to assassinate a former KGB agent, Kirika gets closer to their target than she intended.