Roman TV technicians Fabio and Enzo have been unable to find decent jobs. They decide to crack a safe at a jewelry in Milan. To get the layout of the store, they enlist a beautiful but unsophisticated young woman, Deborah. To find underground access to the store, they get help from a sewage worker. An obese trapeze artist is called for disarm the store alarms. The clever Mrs. Motta, old hotelier, is also involved. Will they succeed?