This novel tells a love story that spans several centuries, centering on the emotional entanglements between the vampire Marquis Giscard and his lover Catherine (later reincarnated as Elena). As an immortal vampire, Giscard must confront the reality of his lover reincarnating, aging, and dying in each lifetime, while he remains forever young. Through a series of events, the novel reveals the profound emotions and sacrifices between the two.