Albany York has a secret. Albany and her twin sister, Brooklyn, have spent years successfully hiding their telepathic connection. But when a girl falls unconscious at their doorstep, the girls learn that they might not be the only people in the world with extraordinary powers and that a memory thief is on the loose. As the twins try to help the girl find her memories, they discover that the superhero world might be bigger-and more dangerous-than they ever imagined.