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Morrigan Crowe and peace are like flowers growing out of the snow: how can it be? Only recently, she and her friends have survived their first year in the Society of the Miraculous in Group 919. A year ago, she already had to face and defeat a vile evil. Now Morrigan is facing a new challenge: to conquer a force that could break out of control at any moment and destroy the girl. But here's the rub: Nevermore is being overrun by the Hollow Virus. This mysterious disease affects the Wonder Animals and turns them into monsters. Every day, the number of victims of the Hollow Virus is growing. Morrigan must save the city and find a cure for the terrible plague. Even if the search for a life-saving elixir puts Morrigan's own life at risk...