An aged, retired Sherlock Holmes, deals with early dementia, as he tries to remember his final case and a woman, the memory of whom still haunts him. He also befriends a fan, the young son of his housekeeper, who wants him to work again.

Sherlock Holmes: I've decided to write the story down; as it was, not as John made it. Get it right, before I die.
Roger: You're not going to die.
Sherlock Holmes: I'm 93.
Roger: I had a great-uncle who lived to be 102.
Sherlock Holmes: Well done. That seals my fate. What are the odds that you would know two men who would live that long?
Roger: Well, I didn't actually know him.
[Holmes laughs]
[Holmes and Roger tend to some bees]
Roger: You ever been bitten?
Sherlock Holmes: Stung! Bees don't have teeth!
[Mrs Munro appears]
Mrs. Munro: You ever been bitten?
Sherlock Holmes: No. I have never been bit.
[Holmes explains a series of deductions about his last client]
Roger: But all that just told you he was married. How did you know he'd come to see you about his wife?
Sherlock Holmes: [smiles] Because when you're a detective, and a man comes to see you, it's usually about his wife.
Sherlock Holmes: There seems to be an outbreak of mortality.