The mysterious disappearance of a Scottish fishing trawler and a death onboard a Trident nuclear submarine bring the police into conflict with the Navy and British security services.The mysterious disappearance of a Scottish fishing trawler and a death onboard a Trident nuclear submarine bring the police into conflict with the Navy and British security services.The mysterious disappearance of a Scottish fishing trawler and a death onboard a Trident nuclear submarine bring the police into conflict with the Navy and British security services.