Jane, who has opened a rooming house, is dumbfounded at the oddities of her first applicant; his name is William Holmes, professing himself to be a ‘Consultation Detective’. Jane has never heard of such an occupation, and rather wants to avoid a strange lodger such as him. However, necessity is a hard master.

Watson, another lodging applicant, proposes to Jane just how Holmes may crack this case he’s been working on…