Cette série explore des royaumes de dark fantasy et des relations périlleuses. Elle suit le destin d'une jeune femme prise entre deux mondes : sa vie terrestre et un monde souterrain séduisant mais mortel, l'Everneath. Ayant perdu du temps dans ce royaume, elle revient avec une horloge qui tourne, une période limitée pour faire ses adieux et chercher la rédemption avant d'être réclamée pour toujours. Sa présence, cependant, attire un puissant immortel qui la désire comme sa reine, la forçant à un choix déchirant entre l'amour véritable et un destin inéluctable.
Six months ago, Nikki Beckett vanished into an underworld known as the Everneath. Now she's returned to her old life for another six months before the Everneath comes to claim her ... this time for ever -- cover.
Now that Nikki Beckett's boyfriend has been sucked into the tunnels of the Everneath, Nikki must journey down to the underworld to bring him back before he is lost forever
Having finally rescued Jack from the dark Tunnels of the Underworld, all Nikki wants is to be with him and for life to return to normal. But Cole tricked Nikki as they journeyed through the labyrinth of the Everneath, and now she's started turning into an Everliving just like him. Desperate to find a way to reverse the process, Nikki and Jack try everything they can think of. Even Cole becomes an unlikely ally, but for how long? Nikki needs to feed on Cole to survive, Cole needs Nikki to gain control of the throne in the Everneath, and Jack needs Nikki because she is everything to him. Together, they must travel back to the Underworld to undo Nikki's fate and make her mortal once more. Will Nikki be forced to spend eternity in the Underworld - or does she have what it takes to bring down the Everneath once and for all?