During the Terror, when heads flew in front of the roaring crowds in Paris, and in the evenings the theater doors were thrown open to the same spectators, the brave and noble Englishman Sir Percy Blakeney, nicknamed the Scarlet Pimpernel, did not for a minute abandon his risky and dangerous work to save the unfortunate from the guillotine. But the invulnerable Scarlet Pimpernel is married to a French woman - the beautiful and dearly beloved Lady Margarita... He returns home less and less, and these meetings increasingly inflame their passion. Margarita is worthy of her husband and, in the face of danger, is ready to share his fate, whatever it may be...

“The Knight’s Oath” is the 1st part of the novel “Eldorado.”