Pisa, 11th century. Spina, a young priestess daughter of Peter, is devoted to keeping a flame burning that illuminates the way back for those returning from the Crusade. But the Florentine knight Lamberto falls in love with her and the two young men fail in the vow of chastity that Spina committed. The shame for having betrayed the promise of purity made pushes Spina to suicide and Lamberto kills himself with her.

"Despite having the name of the production company, it is not possible to find the title of the film in the press of the period. The beginning of the film is missing, so there is no main title. Some children find themselves on a rocky island (in Brittany?). They are visibly devastated, as they had to leave in secret from their parents. On the mainland there is panic. Men leave in a boat and find all the children, except one, little Georges Durieu. Madame Durieu faints. Seeing this, a man who looks a bit like the “village idiot” takes his boat and finds Georges on the island. In the meantime, Mr. Durieu returns from his trip unaware of the situation, and Mrs.Durieu cannot bring herself to tell him of the disappearance of their son. But when the father arrives in his son’s room, Georges is in his bed, brought back by his savior. – Emmanuelle Berthault"