A generous doctor is aghast that the population of a small island is being oppressed and mistreated, but is seemingly unable to do anything about it, until the arrival of a young woman and the death of one of his friends prompts him into action.

Robert and his fiancée Lucienne were due to go on vacation together to a tented village in Sicily. Robert is forced to postpone his trip and only joins Lucienne a few days later, taking advantage of the departure of a following group. During the train journey, he befriends Thérèse, a young Sicilian living in Paris, who wants to make a pilgrimage to the land of her ancestors. Lucienne is away from the camp when Robert arrives, so he can continue to see Thérèse, and little by little they discover that they love each other. When Lucienne returns, an explanation and reconciliation take place, then Robert changes his mind and, with the vacations over, leaves Lucienne alone to live in Sicily with Thérèse, who wants to stay in her family's homeland.