Erica Reed, an FBI agent in Boston, lost her brother years ago to a serial killer who was never caught. In the high-stress hunt to save him, she began developing the strange and uncontrolled power of post-cognition: by touching an object, she can see its past, events that happened on, to, or around it. When she comes across a crime scene that has clues that were left specifically for someone with her abilities, a new hunt is on. Who knows her secret? How? And what do they want from her?