Located off the coast of South Australia Kangaroo Island lies surrounded by violent seas harbouring deadly great white sharks and forgotten shipwrecks. Over the centuries the Islanders have cultivated a sense of self-sufficiency independence and resilience. But times are changing: multimillionaires from the mainland are building clifftop mansions and filling the skies with private planes. A quiet paradise is being transformed into a bolthole for the rich and privileged. And the locals aren't happy. Richard Marlowe a wealthy 'blow-in' to the island goes missing last seen wading into the ocean for a dawn swim. A shark attack is blamed but things don't add up. Reuniting for a new investigation Detective Sergeant Manolis and Senior Constable Sparrow arrive. Faced with hostility from both Islanders and newcomers their attempts to locate the missing man are derailed by a civil war over limited resources a fragile environment and fractured community dynamics.