Follow the exploits of the children who go to a most unusual school - the sail-powered training ship Tobermory.
When a film crew arrives in Tobermory Bay, Ben and Fee are invited to be extras. But their suspicions are soon aroused - is the film crew genuine, or are they up to something sinister?
Ben and Fee soon discover the truth when they uncover a dastardly plan masterminded by a South American businessman.
