Clinical psychologist Dr Tony Hill is asked to help police track down the brutal killer of three men in Bradfield. DI Carol Jordan hopes his skill as a profiler will crack the case, but Tony's off-beat methods cause others to dismiss him. When a cop is killed, the pressure for results mounts. Police focus on the gay scene, while Tony thinks the killer is sending a message on the body of his victim. Then the investigation takes a more personal turn.

When two teenagers' bodies are pulled from a Northumberland tarn, Dr Tony Hill immediately suspects a multiple killer. DI Carol Jordan is called to the home of popular chat show hosts Jack and Amanda Vance, who fear they are being stalked. As the dead girls are identified as suspected runaways, the attacks on the Vances escalate dramatically. Could the two investigations be connected?