Captain Sebastian Sinclair, youngest brother of Dare and Ian of previous novels, travels on the Continent with Wellington after Napoleon's defeat. He encounters a Spanish noblewoman, Maria del Pilar Mendoza y Aranjuez. Pilar is dressed in her maid's clothes, trying to steal Sin's uniform to escape her cruel guardian. Sin gallantly fights for her, and the guardian brutally scars his face, but in answer to Pilar's pleading, spares his life.
When they meet again, Pilar and Sin are even more attracted, a fact that Pilar's evil guardian plots to end with Sin's murder. The plot snares Sin's best friend and that death makes it impossible to trust Pilar, but it's still more impossible for Sin to leave her behind. He kidnaps Pilar, marries her to transport her to England, and places her under the protection of his family there.
My favorite of the Sinclair Brides series.
Sebastian Sinclair (one of the Sinclair Brothers) is a solider in Spain where he rescues a beauthiful Spanish noblewowan from a monstrous evil.