Story about a happily married couple visited by an old friend, who ends up stirring the pot by becoming sexually involved with both the husband and the wife.
Buffalmacco and his friend Bruno Degli Olivieri make a joke of Calandrino, forcing him, for ten florins, to buy a stone that should make invisible the one who owns it.
A guest turns into nightmare. Story revolves around protagonist and his wife. An Unwanted guest and her desire ruins their personal life. See who wins between lust and love.
