Reggie and Nigel Heath--brothers who lease law offices at 221B Baker Street in London, England and answer mail addressed to the location's most famous resident, Sherlock Holmes--find themselves pulled once again into a case straight out of Arthur Conan Doyle. An elderly American heiress wants to leave her entire fortune to Sherlock Holmes. A translator wants Sherlock Holmes to explain a nursery rhyme. And Robert Buxton--Reggie's rival for the love of actress Laura Rankin--has gone missing. Reggie must suss all these things out before an upcoming British royal event. If he doesn't, something very bad will happen to everyone at that event--and to Laura.