The drug trade route stretched from London across Europe and part of Asia to the borders of Afghanistan. Investigating one part of it cost the life of a police detective name George Lacon. Although his death was reportedly suicide, Detective Inspector Marler felt certain it was murder. But to trace the murderers proved a difficult task. Former career criminal Mike Cann might have been able to help, if he had been willing to give information to the police. But there's reasons behind Mike's hesitation - for in more ways than one, he himself was involved.