While going through the possessions of a deceased guest who owed them money, the mistress of the inn and her son find a treasure map that leads them to a pirate's fortune.
Dr. Jekyll invented a drug that would change him into the ominous Mr. Hyde. His evil nature, however, became the stronger part of him and to his horror, he no longer needed the formula to transform his appearance.
When a boy and his mother discover a treasure map among the personal effects of a deceased boarder who owed them money, the youth finds himself launched on a dangerous adventure with pirates.
