When a convicted killer is released and later found brutally murdered, DI Henley and the Serial Crimes Unit are pulled into a deadly investigation with links to other recent attacks – all the victims are connected by the vicious signature left behind by the killer.

Henley and her team begin to connect the dots between the killings, and realise the murders are part of something more sinister. Each victim has been chosen with a deadly precision, their deaths carved out with a shocking cruelty.

As the rampage continues and the stakes are raised with each new attack, the case spirals into a terrifying hunt for a killer who is always one step ahead. Can Henley and the SCU outsmart a monster before they strike again?