A young sculptor presides over the destinies of a student club where a miserable young girl ends up one evening. The treasurer of the association falls in love with the young girl who returns the favor. The war. The sculptor comes back blind. Out of gratitude, the young girl marries him and restores his confidence in his talent; out of discretion, the treasurer steps aside.

Before the war. Mr. and Mrs. Boisleroi, well off, lived in their castle while their son Jacques courted Geneviève, the manager's daughter. On mobilization, the manager becomes flight captain, Boisleroi a simple waykeeper and Jacques wants to enlist. Refugees arrive: an actress, a player, an old marquis, former owner of the castle and who will die there. All this life together culminates in the marriage of Jacques and Geneviève.

A gang of broke student musicians travel to Paris to take exams. But very quickly, the lack of money pushes young people to pass themselves off as professionals during the performance. They will then win the victory!