When young and attractive Lina Stroppiani, a thief like the rest of her family, tries to steal the taxi of Paolo, together with two accomplices, she can't possibly know that this will have far reaching consequences.
The film portrays the comic adventures of a group of summertime travellers. Produced at the height of the fascist era, Treno popolare was nonetheless free of propaganda, and featured the first film score by the legendary composer Nino Rota.
During a police raid at Villa Borghese, the agent, a widower named Antonio Caccavallo, stays to get better acquainted with the young Carolina.
