In "A Case of Identity," one of Sir Arthur Conan Doyle's Sherlock Holmes stories, Mary Sutherland seeks Holmes' help to find her missing fiancé, Hosmer Angel. Through his remarkable powers of deduction, Holmes uncovers a deceitful plot orchestrated by Mary's stepfather, who disguised himself as Angel to prevent her from marrying and claiming her inheritance. The story highlights Holmes' analytical brilliance and his ability to see through elaborate deceptions.
