Before the experimental surgery that gave her sight, Kendra Michaels developed her other senses to an amazing capacity. Now she can identify a Nissan by the sound of its engine, a Norelco electric razor by the pattern of stubble it leaves behind, or an obscure colorless fire accelerant by its sweet smell. Law enforcement agencies clamor for her rare powers of perception and observation, too often disrupting the life she has built helping others through music therapy.