A newspaper article about a vandalized painting catches the eye of William James Moriarty. Recognizing the artist from his childhood days in the slums, he takes his brother Louis with him on a trip to the city of Bath to meet with the artist personally and identify the culprit. However, the person claiming to be the painter is not the man William remembers. Joined by Sherlock Holmes and John H. Watson, William looks for clues in order to find his old friend.