The story of a small locomotive from Little Schnarching that sets out on its own to explore the wide world and, after a series of frightening experiences in the modern world, returns to its quiet home station, timid and remorseful. Based on the children's book by Graham Greene.
Murders, with victims dying from spines broken by brute strength, erupt in the city and the killers, when encountered, walk away unharmed by police bullets which strike them.
Since the capable landlady Maria bears a striking resemblance to the ruler of a miniature state, she is tasked with playing the role of princess during her absence.
A man embezzles some money in order to pay his debts and the daughter of his boss, who is in love with his son, asks a rich former suitor of hers for help.