This time the "amici" (friends) are just four: Necchi, Meandri, Mascetti and Sassaroli. Nevertheless they are older they still love to spend their time mainly organizing irresistible jokes to everyone...
A meek Belgian soldier (Harry Langdon) fighting in World War I receives penpal letters and a photo from "Mary Brown", an American girl he has never met. He becomes infatuated with her by long distance...
Returning by train to the French port of Le Havre, Jacques Lantier, a tormented railwayman, meets by chance the impulsive stationmaster Roubard and Séverine, his wife.