Eighteen months have passed, but the scars the Ragdoll murders left behind remain.
DCI Emily Baxter is summoned to a meeting with US Special Agents Elliot Curtis of the FBI and Damien Rouche of the CIA. There, she is presented with photographs of the latest copycat murder: a body contorted into a familiar pose, strung up impossibly on the other side of the world, the word BAIT carved deep into its chest.
As the media pressure intensifies, Baxter is ordered to assist with the investigation and attend the scene of another murder to discover the same word scrawled across the victim, carved across the corpse of the killer – PUPPET.
As the murders continue to grow in both spectacle and depravity on both sides of the Atlantic, the team helplessly play catch up. Their only hope: to work out who the ‘BAIT’ is intended for, how the ‘PUPPETS’ are chosen but, most importantly of all, who is holding the strings.