1947 England, 93-year-old longevity great detective Sherlock Holmes () has retired, lived in England Sussex countryside villa, and he accompanied only his housekeeper Mount Ms. Luo ( ) and the housekeeper's son Roger ()
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After retiring, Holmes became a beekeeper and began to recall and record his past. In the days when he remembered, recorded, and taught little Roger beekeeping, Mr. Holmes was also with his declining mind and memory. Fighting; he recorded an old case in his memoirs that has troubled him so far, and Roger became his most loyal reader. And because of the brooding about the old case, Holmes is determined to solve an unsettled case decades ago without the help of Watson (), and this will become the last adventure in his life.
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