In 1947, a retired Sherlock Holmes resides in a Sussex village with his housekeeper and her young son, only to be plagued by a 30-year-old case that has left him with fragmented memories.

Mr. Holmes
A former Sherlock Holmes struggles with the onset of dementia, his mind increasingly foggy as he tries to relive his final investigation, with the enigmatic woman's recollections persistently haunting him.