A village in the French Alps is rocked by a series of crimes, including the theft of a sacred ring and the murder of a man dressed as Père Noël (Father Christmas).

Mademoiselle Bressac is a bossy spinster who manages "Le Clos", her estate, with an iron hand. But is she really a bad person? Her manners are abrupt but they only hide a heart of gold. Doesn't she bring up four orphans, Dominique, Fabien, Chantal and Jean? And as if it were not enough, she has accepted to educate another child, her niece Patricia, entrusted to her care by her irresponsible father. Thanks to her, the five young people have grown up in harmony and now they are about to find their place in society. Two of them, Jean and Patricia, who love each other, live only for the estate.

A rich businessman living alone is deprived of the nephew he was to have brought up decides on his doctor's advice to search for the four illegitimate children he once fathered, which leads him to accept responsibility for his actions.

A student from an elementary school accidentally breaks the glass roof of his school. His comrades decide to support it by working during the summer holidays in order to pay for reconstruction.

The professional and sentimental misadventures of Maurice, a young engineer who works unsuccessfully on the development of a new model of airplane.