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In a parallel present, Natalia works as a hotel maid, practices martial arts, and cares for her brother, Calvino.
When kids reach Cal's age, they lose their ability to feel emotion. But Cal isn't waning. When a mysterious corporation kidnaps him for testing, Natalia's reaction surprises her: she's crushed, and she'll do anything to save her brother from their experiments. But the road to his rescue leads her to the shocking truth about waning.