A mutilated body is discovered on a remote island, and Ross and Reid leave Glasgow to investigate, but find that the inhabitants are wary of outsiders and seem reluctant to assist them. They return to Glasgow with the body, while Burke and Fraser make some headway and manage to connect the victim to a drugs racket in South American. Then another person on the island goes missing, and the team has to consider how much the drug dealing has infiltrated the remote community. (thetvdb.com)