Two hundred years ago, secret documents so sensitive they could alter the course of history were stolen from a courier with the London War Office. At the scene of the crime, the victim was left with a curious note containing only a small black symbol pinned to his chest. Authorities were baffled. It took two centuries for a young American history student, Eloise Kelly, to uncover the missing pieces of the puzzle...

As Eloise reads from an old codebook, she discovers that the Black Tulip, the deadliest spy in Napoleon's arsenal, had returned to England with a terrifying mission. Only a pair of star-crossed lovers stands in the way of the Black Tulip. But, would stopping the Black Tulip's secret mission cost them their lives, or even worse their love?