Frightened and nervous ten year old Jeremy Benson is being sent away to a new school, but instead of being placed on the train that would take him there, he is placed on The Gateway Express, a train like no other. During his terrifying ordeal on board, he is befriended by another passenger, sixteen year old Sara, who shows him the mysteries of the train, including the frightening and mysterious "black door."The Gateway Express is a tale of how the life of little Jeremy unfolds, and in the process, he must face and rise above the most terrifying thing of all, himself.