What better place to go for a rest than a hotel beside the sea which offers its guests 'a restful stay, free from the cares of the workaday world'. However, soon after the arrival of Sherlock Holmes and Dr. Watson the latter encounters a chambermaid with 'a look of mortal terror on her face'. Upon further investigation the body of a dead man is found in one of the bedrooms, and so begins an adventure which will involve blackmail,...