Seventeen-year-old Cassie is a natural at reading people. Piecing together the tiniest details, she can tell you who you are and what you want. But it’s not a skill that she’s ever taken seriously. That is, until the FBI come knocking: they’ve begun a classified program that uses exceptional teenagers to crack infamous cold cases, and they need Cassie. Soon, it becomes clear that no one in the Naturals program is what they seem. And when a new killer strikes, danger looms closer than Cassie could ever have imagined. Caught in a lethal game of cat and mouse with a killer, the Naturals are going to have to use all of their gifts just to survive.