At a train station, passengers await to board an old time steam engine for what seems to be an exciting weekend trip to an exotic theme park. When the train arrives, The Engineer gives them some last minute instructions to prepare them for the journey. The Engineer seems pretty cool until he casually mentions that once the train takes off, they wont remember him; the passengers board the train thinking that The Engineer is a bit weird. The passengers settle down and they begin to fall asleep in their compartments. But- When they awake, they are infants. The train ride is a trip through life as the passengers grow from children to teens to married couples and eventually to old age and death. The Engineer never leaves them and is always there to help or kick some sense into them. Still, the passengers do not see him until they pass into death and find themselves ready for the next great adventure.
