Horace tells Mickey that someone stole a book from his office, so he asks Mickey to find the suspect and retrieve the book.
Mickey needs to paint the toon footprints all the way to the roof of the Cinema. There Shifty (if Mickey painted all the footprints) will give him the book. If Mickey did not paint the footprints, Shifty will give Mickey the book for 30 E-Tickets. If Mickey gives the book back to Horace, he will give Mickey a Power Spark.