After Lucan, a Roman vampire, turns Aurélie in the midst of the violence of the French Revolution, she soon discovers that immortality comes with a heavy price. Filled with unsuspected turns, clumsy discoveries, a mortal man that stirs her passion, and her own complicated relationship with Lucan, Aurélie still has to face the monsters that want to destroy her and meet the terrifying fount of the werewolves. As if that isn't enough, she has to race against time to prevent a war that threatens between vampires and werewolves. Aurélie and Lucan's journey is a trail of eye-opening discoveries about those she thought she could trust and those she thought were her enemies. Lucan, having to face his own demons from his past, finds his destiny inextricably entwined with Aurélie and her allies. When at last, their true quest becomes clear, Aurélie finds her way through the gates of immortality to search for the ancient source of them all, and save the immortal world.
Although Lucan's books are a spin off, and can be read as standalone books, his story brings the Aurélie saga to an end.