A scattered bunch of Italian mercenaries led by Hector (Bud Spencer) has to choose whose side they will be on in the war: the arrogant French noblemen or the starving Spanish people defending a castle. At first, they go where the money is. However, after they are insulted by the French, they join the ranks of the defenders and even arrange a special challenge: a tournament between 13 French and 13 Italian knights. The problem is: they are no real knights. And they are not 13, either. But with a little imagination, anything seems possible...
Amusing comedy in a medieval setting, Bud Spencer in one of his typical roles with two good fists, Enzo Cannavale is great as his sidekick, a self-proclaimed history writer, and you will keep on humming the merry title theme for days. Not among the 4 or 5 best Spencer comedies, maybe, but it's certainly not one of the worst either.