Erica Reed, a Boston FBI agent, 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 power of post-cognition: by touching an object, she can see its past. Though useful in her line of work, it has caused her both personal and professional problems. 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?