"Sherlock Jr." is a quintessential work by the "Great Stone Face" Buster Keaton. This 1924 silent film, with its superb performance, ingenious use of props, and smooth pacing, still captivates audiences to this day. Watching the film feels like entering a whimsical dream. The film immediately introduces the main storyline: "This is a story about a boy who tried. While working as a projectionist in a small-town theater, he is also studying to become a detective." Keaton plays the boy, a cinema projectionist with dreams of becoming a detective. The story is threaded together with detective books and screen films, connecting the two parts of the plot. In the first part of the film, the boy embarks on his detective journey by reading detective books. This section is full of innocence and humor. The book, a simple prop, not only advances the plot but also leads the boy to make a series of earnest yet hilarious choices, leaving the audience in stitches. In the s...