There’s something lurking in the loch. But it’s not Nessie, it’s a dead man with stones tied to his shoes.

The body count soon starts to mount up in this new police drama series set on the banks of Loch Ness.

There’s a monster on the loose, but this one isn’t a mythical one to delight tourists, it’s a very real, vicious and predatory killer.

DS Annie Redford (The Missing’s Laura Fraser) is called to a body at the bottom of a cliff, while a human heart is found in the leftovers of a teenage prank.

Happy Valley star Siobhan Finneran plays no-nonsense DCI Lauren Quigley, with ex-Holby and EastEnders star Don Gilet as a fancypants forensic psychologist, Blake Albrighton.