Medieval France is the setting for Spanish playwright Vélez de Guevara's lively critique of the Salic Law, forbidding women from inheriting the throne. The French are desperately in need of a male heir, and the last king made sure they got one: his daughter Carlota, secretly raised as his son, King Charles the Fair, now celebrating their 20th birthday. All would be well in the kingdom, if the people didn't hate the king's favorite companion, Rugero. And if Charles were not secretly in love with Rugero. And if the English prince were not storming the castle, demanding that Charles marry his sister. The fate of the realm hangs in the balance, as ungovernable emotions explode in this political comedy that proves all's fair in love and war!