After breaking into a house he believes is empty, thief Olivier is caught by the owner, Ariane, who turns out to be a dominatrix. Improbably falling for her, Olivier returns periodically, and an impulsive romance blossoms despite Ariane's profession. Soon Olivier becomes more familiar with her work, even joining in on occasion. However, when he discovers that Ariane has a son, he attempts to "fix" her, hoping to give her a better life.
This story is set in the 13th century, in Britain, where Lancelot, who was raised by Vivian, the Lady of the Lake, becomes one the Knight of the Round Tables and falls secretly in love with Guinevere, the wife of King Arthur, for whom he wants to accomplish many deeds.
Documents relevant to National Defence have been concealed in a certain vase by a dangerous gang of robbers. To neutralize the criminals, a seasoned police commissioner and his clumsy assistant, young inspector César, join forces with a colorful trio of thieves nicknamed Le Pouce (Thumb), L'Index (Index Finger) and Le Majeur (Middle Finger)...