FBI Special Agent Danielle Hernandez, 28, a rising star in the BAU, equally esteemed by her colleagues for her brilliance and determination, is not used to turning to a doctor for help in solving crimes. This unlikely partnership, though, may just surprise them both.
Morgan and Danielle grapple with the motive behind this erratic killer. Why use a drug that saves people to kill them? Might the killer himself be sick? Could rival pharmaceutical companies be involved?