Three-year-old Tommy receives a book from his father, a painter, in which he has illustrated Tommy’s life. In a child's imagination, the train from his father's book becomes the number one enemy, which he must chase and fight to save his parents, pets, and the entire world. It is the same train that whistles in the courtyard outside their cell windows, taking people to an unknown destination. His dad, mom, and millions of others will never return.