A passenger onboard a train passes away on route to his destination. Two other passengers, Chloe (Leelee Sobieski) and Pete (Steve Zahn), along with Miles the conductor (Danny Glover), notice the recently deceased man and discover that he has a bag of valuable diamons on him. The three become stricken with greed, try to keep the treasure for themselves and attempt to dispose of the man's body. They come up with a plan to make it seem as if the dead man never boarded the train, and as there are no other passengers there would be no witnesses. They remember that the railway passes close to a river and so this provides the perfect opportunity. However to do so they need to fit him in to a trunk, and the only way to fit him in is to chop his body into pieces. The passengers soon become paranoid as they begin to suspect and distrust each other.