FBI Special Agent Grace Billingsley tracks serial killers, using her skills as a psychiatrist and behavioral analyst to get dangerous people of the street. Prison psychiatrist Sam Monroe knows that just because a killer is incarcerated doesn't mean they're not a threat. His own father, Peter, is a serial killer in prison-- but not out of his son's life. When bodies show up with similarities to Peter's MO, Sam and Grace are both called in to consult. They share an awkward past, but they will have to work together to solve this case. -- adapted from back cover