Jim Carrey says of his characters in the film: "In the movie I first read a book about Sparrow that resembles a human story, but instead I (Sparrow) whose job is to gather stray dogs is a clever and fascinating detective. In the name of Fingerling, after many of my plays in childlike characters, Finger has no childlike character at all. He is stiff and strong and plays saxophone with his tattooed hands and I had to learn to play this instrument. "Finger must discover the mystery of the killings that take place in relation to the number 23, and it seems like everything in the world can go back to that number ... and it was an exciting dream for me."