The sharp, witty and enigmatic DI Annika Strandhed, as she heads up a new specialist Marine Homicide Unit (MHU) that is tasked with investigating the unexplained, brutal, and seemingly unfathomable murders.

Prepare to enter the dangerous world and troubled mind of Detective Inspector Ray Lennox, a man engaged in a disturbing battle with his own demons, through the demanding and very public medium of serious crime investigations.