Nova Hayes has been dead for fifteen years. At least, that's what the records say. When she was eight years old, Nova lost control of an ability she barely understood. She could feel emotions before people spoke them, sense the energy beneath fear, anger, grief, and desire-and, without meaning to, make others feel them too. The incident left people injured. Some never made it home. Nova did. She was taken to a facility that doesn't officially exist, where she has spent most of her life being studied, contained, and taught one thing above all else: people like her are dangerous. They call them Marked. Asher Reid knows a different name. Sent undercover by Redline, a clandestine network of humans and Resonants fighting to expose illegal containment programs, Asher expects to find prisoners, experiments, and enough evidence to bring another facility down. He doesn't expect to find Nova Hayes alive. And he definitely doesn't expect his ability to interfere with hers. As Asher gets closer to the truth behind Nova's imprisonment, Nova begins uncovering something far more dangerous than the walls keeping her inside: she was never kept there simply because they were afraid of what she could do. They need her for something.