Discover, the new joys of marriage! Tired of the sweet monotony of their life together, Serge and Caroline, decide to "have fun" ... Caroline confesses to her friend that she would be curious to make love with another woman, and she enjoys the meeting a hitchhiker to be seduced. To console Serge, a jealous of the adventure of his wife, he invites a babysitter, Greta, to keep his "baby" all night. Greta realizes very quickly that the "baby" is already big and that he has many talents which he makes Greta and Caroline enjoy. The couple will multiply the adventures of the same kind, discovering each time new pleasures ...