M leaves the keys to hell with warrior monks in China's Yellow Mountains. While searching for her family of origin, and source of her demon-killing powers, citizens begin to disappear in Paris, the City of Light. Duty calls.
M now has an implacable foe, Baigujing, the Bone Goddess. The Queen of Hell wants to destroy everyone and everything M loves, empty Hell into our world and, then sacrifice M on the High Plateau of Tibet.