In hopes to gain some publicity, a starlet and her producer work on a stunt to have the starlet appear to have adopted a baby. Unfortunately, due to a mix-up, the authorities believe that the infant is kidnapped and the starlet is transporting the baby on the Chicago-to-Manhattan express. Engineers and passengers alike get mixed up in the misunderstanding, all the while the infant keeps disappearing and reappearing as the train progresses to its destination.