A funny thing happens to Lurcio on the way to the rent-a-vestal-virgin market stall. A mysterious scroll falls into his hands, listing the names of all the conspirators plotting to murder Emperor Nero. And when the upstart slave is elected to infiltrate the ringleader's den, the comical ups-and-downs lead to total uproar.

Armitage runs a chemical company that is on the verge of producing a gas that causes temporary disability. Clearly the military want it but it is also sought by a group of Japanese. Both Armitage and Madam Greenfly hire different people in the same detective agency to guard the gas and steal it respectively... confusion, double crosses and hilarity ensue...