The era of the Napoleonic Wars. Dozens of French spies operate in England, but the most famous of them is the desperately brave, resourceful and cruel Black Tulip. Who is hiding under the code name? How does this dangerous man manage to slip out of the networks of experienced British agents again and again? Sir Miles Dorrington and his fiancee and faithful assistant Henrietta Uppington, who are on the trail of the Black Tulip, are trying to understand this. However, the mysterious French spy is constantly one step ahead of them - and soon it becomes clear to Dorrington and Henrietta: from pursuers they are about to turn into the target of the Black Tulip. Sir Miles has only one thing left to do: go for broke, putting not only his own life at stake, but also the life of his beloved...