Sailor warriors triumphed over the demon Demoun clan and set off to America to celebrate their victory. Meanwhile, Sailor Aquarius, Aoi Mizuki, remained in Japan to care for her sick mother, watching the airplane depart from a rooftop. At that moment, a new threat awaited her. The Dark Sailors—descendants born through the reincarnation of warriors who once fought for justice, but who had since resorted to corrupt methods to crush evil. Emerging from the shadows, they plotted the nightmare annihilation of the Sailor warriors. Aoi transformed into Aquarius and fought back, but was captured by Sailor Meteor's clone and delivered into the hands of Barura, a plant monster from the Dark Nebula, leaving her body imprisoned.