Detectives Calladine and Bayliss hunt for a vicious killer.

The first victim is found on waste ground. His tongue has been cut out and stuffed down his throat.

Then another body is found dumped in a lake up in the hills. The same gruesome murder method is used.

And guess who the detectives’ new boss is? The incredibly difficult Stephen Greco.

A twisted killer . . . And a wicked twist.

Meanwhile DS Ruth Bayliss’s personal life is falling apart and someone is targeting local businesses with ransomware.

The prime suspect is a criminal DI Tom Calladine thought he’d seen the last of.

Who’s the serial killer and who’s next on the list?