 There is a serial killer loose in Chicago and the police have nothing to go on. Trisha Daily, a top FBI profiler, has worked for years looking forward to solving each case she is assigned. The Chicago P.D. now need her to work with their top detective John Sparks. John Sparks is a intelligent and good looking detective that may make her lose her focus on what she was sent there to do. Trisha and John immediately feel an undefined attraction to each other. Both are at the pinnacle of their careers, both are determined and both could lose their lives solving this case.