Spain, 1813. Major Richard Sharpe eagerly awaits Wellington's confrontation with the French in a decisive battle. However, without the Spaniards, an English victory would be impossible, which is why the alliance with them must be preserved at all costs. The French spy Pierre Ducos, a sworn enemy of Sharpe, is also aware of this. With the help of the beautiful Marquesa Hélène, the Frenchman has devised a diabolical plan that will break the Spanish-English alliance and destroy the hated Sharpe.