Sean Brodie, an American engineer on contract in Adelaide, and his partner of eight months, local boy Rob Markham, are struggling to save their relationship by hiring a boat for a week's fishing off the wild south Australian coast. As a storm approaches, they go to the aid of a luxury cabin-cruiser apparently in trouble, only to find that they've stumbled into a drug smuggling gang's offshore headquarters. A lucky escape is only the start of their troubles, as they find their pursuers have unexpected friends on land as well as sea.