A serial killer is killing victims with rapid speed, and in each crime scene, he leaves an unusual signature: an hourglass.
Its sand is designed to fall for 24 hours-and when its empty, a new victim appears.
Amidst intense media pressure, and in a frantic race against time, FBI Special Agent Riley Paige is summoned, with her new partner, to crack the case. Still reeling from the fallout with Shane, trying to sort out her family life, and to help Bill get back on his feet, Riley's plate is already full. And as she enters the darkest canals of this twisted killer's mind, this just may be the case that sets her over the edge.
A dark psychological thriller with heart-pounding suspense.
