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.
Mariana develops a paranoid disorder after witnessing the murder of two people. She now decides to take care of the victims’ little girl. In a race against time, Mariana has to protect her and herself from the assassins, overcome fears.
