The Posalaquaglia cousins are two small scammers and make a living of expedients: Dante receives as recognition for Tommaso a bill of one hundred thousand lire from the famous financier Bruscatelli, who ends up in prison immediately afterwards. Thus begins the journey of the bill that will be able to upset the life of the landlord of the Passalaquaglias, who had it for rent, will use it to buy a purebred dog in Ottavio's shop who will use it to pay the salary to Michele who will give it. to Odette after a night spent together. Odette will use it to buy a fur coat involving Alfredo, his wife and Olimpio. Finished in the hands of a manager of a fighter from Luna Park, the promissory note, protested, will begin the long journey backwards.