November, 2052: Nell Donovan is born with a fish scale on the nape of her neck, the first of many such babies. January 2100: Floée 84Aα prepares to confront 39 scale bearers in a merciless competition. The goal? To be selected as a lifelong team member of the multinational Scarlet Scale, founded by a self-proclaimed messiah of radical environmentalism, promoter of a new humanity... When Nell realizes that the guru uses the competition to select teenagers according to eugenic and racist criteria in order to exploit the wealth of the ocean depths, she decides to organize a rebellion. The two women cross paths in a dramatic confrontation in the middle of the ocean.