Pierre Adet is a young revolutionary with a death sentence passed on him, whose father is hanged for his son's crime. Seeking the revenge against the Duc de Kernogan, Adet flees to England, becomes Martin-Roget and pursues Duc's daughter Yvonne, who is also a matter of interest of Lord Anthony Dewhurst. Lord Tony must seek the help of The Scarlet Pimpernel to save his loved one.