A Riverbank littered with bodies. A city under siege by crime-solving "experts." One young detective struggles to discover the truth ... and preserve her sanity.Spokane, Washington: a bustling city split by hurtling white-water falls. During a routine drug bust, Detective Caroline Mabry finds herself on a narrow bridge over the falls, face-to-face with a brutal murderer named Lenny Ryan. Within hours, the body of a young prostitute is found nearby, dumped along the riverbank. Then another. And another. Soon Caroline and her cynical mentor Alan Dupree are thrown headlong into the search for a serial murderer police have nicknamed the Southbank Strangler. But while Caroline hunts a killer, he may also be hunting her.