Angela Mathers is brilliant and calculating. She's also a Human Plus, part of a top-secret program that implanted neural chips into children to correct "disorders" and enhance intellect. In a world where technology and equality have been cast aside, she's desperate not to lose sight of her life's work to get a government bill passed into law which will free the Pluses. Isabella Dodge works for Control, the agency tasked with tracking and imprisoning the remaining Pluses. But she has one secret. She's a Solo--someone who fled the Human Plus camps, but not before she was implanted with a neural chip. When Angela is accused of her best friend's murder and exposed as a Plus, hers and Isabella's paths cross. An innocent touch sparks something in both women, but is it love, or simply their neural programming? When Control finds out Isabella is a Solo and captures her, Angela finds her answer--she will risk everything to save Isabella, even her own freedom.