"Don't go all spooky on me, Jack. It was some crazy mental person on drugs with a weapon we haven't found yet." When the body of a male is found in an alley ripped to pieces, PC Lauren Wylie and her teammates know that night duty is going to go from bad to worse. DS Jack Ladd of the elite Met Police Murder Squad has been placed in charge of the investigation, and as he digs deeper, what he finds is bizarre and terrifying. The bodies pile up, each one torn to shreds, and nothing can prepare Jack and his police colleagues for what is to come.