After having challenged the German Ottone to single combat for the hand of Leonza, the bishop's niece, the valiant knight Anselmo da Montebello, leaves for Rome where he must deliver a precious relic to the Pope and obtain a sum of twenty-thousand crowns in order to participate in the third crusade in the Holy Land.
In a French seaside town, at a boarding house for civil servants recovering from surgery and maladies, the six male residents' lives change dramatically when two women arrive: Catherine, lively, sexually liberated, willing to kiss, dance, and sleep with the men, and Leonie, reserved, formal, conservative.
Intent on seeing the Cahulawassee River before it's turned into one huge lake, outdoor fanatic Lewis Medlock takes his friends on a river-rafting trip they'll never forget into the dangerous American back-country.