When a severed penis is found washed up on a beach, a search is launched to find the victim and the detectives soon find themselves dealing with reports of a stalker and a subsequent kidnapping.
Beneath its surface exists a playground for the murky underworld, a place of illicit rubbish dumps. pollution hazards, the remnants of huge drug hauls, and a graveyard of bodies from years of suicides, accidents and murders. That's the world of the WATER RATS, and elite bunch of 70 brave men and women guarding the harbour against all the elements that threaten to foul the blue waters.