In Sherlock Jr, demonstrate a man which is a movie projectionist frustrated in love because the object of his affections is attracted to a dishonest rival. Sherlock Jr is also an aspiring detective, and when the girl's father's pocket watch disappears he tries to take charge of the situation. But the rival contrives to make him look like the culprit. While projecting a show about two lovers and a similar domestic crime, Sherlock experiences a bizarre daydream of "entering" the world of the movie