A man runs through the forest with a small box in his possession. A train has pulled into the station, but it seems that no one gets on board. When the train is pulling out the man who was running in the forest appears. The crew lets him board, and assumes he speaks no English, because he doesn't speak. There appears to be only about five passengers on the train at this time. He sits with two of the passengers, and is offered a drink by a somewhat drunk passenger. He takes a mouthful of pills with the vodka. This is the second time he has taken a fair amount of the pills. Not long after the second helping of pills he dies of an overdose.
The two passengers realize what has happened, and seek help from the conductor(Danny Glover). They decide to alert the authorities at the next stop. In the meantime the box is discovered, and the fortune of jewels hidden inside. The two conductors want to keep the fortune that could change their lives for themselves. When they show the box to Glover, he confiscates it back to his office. When he looks inside the box, all thoughts of turning the box over to the authorities change.
The story takes on several paranoia twists, as the men try to decide what to do with the body, and the box. At first they want to throw the body into the river. They eventually go to the extreme of chopping him up, and cramming him into a small trunk. They try to keep the others from discovering what has happened to the man, and about the box. The greed that takes over sends both men over the edge. The box seems to have a mysterious evil quality to it, which influences each person who possesses it. The passengers on the train don't realize the effects of the box until it is too late.