Set in the English Lake District, Abigail, Imogen and Ross, the young heroes of the story, are enjoying a well-deserved holiday when they accidentally become involved with a group of drug smugglers. The smugglers, a far from friendly group of men, have a hideout in the workings of a long disused copper-mine and the trio are set to have some hair-raising adventures, and put themselves at considerable risk, as they find themselves fighting for their lives whilst trying to save the life of an undercover policeman and bring the criminals to justice