A war has been going on for centuries between vampires and Lycans/werewolves, never seen by humans eyes, until one of the werewolves by the name of Lucian (their previous leader) finds out about one human that can bond with vampire blood and Lycans blood, Michael. Selene is the vampire Death dealer that finds out why the Lycans are following Micheal and falls in love with him. Micheal gets bitten by Lucian and to save him Selene bits him turning him into a Vampire/Werewolf becoming the first hybrid. Kraven is the leader of the vampire house after Viktor dies and wants Selene by his side, but she is a wild cat who can't be controlled.

Tribes of vampires and werewolves battle for supremacy among the undead in the Underworld. Tracing the bloody history of the ongoing war between the Death Dealers (a gang of upper-crust vampires) and the Lycans (a pack of scruffy werewolves who live under the ground). Death Dealer Selene and Lycan Michael exploring their own pasts as well as those of their comrades in hope of uncovering the secrets of this centuries-old conflict. As Selene and Michael deal with their bloody legacy as well as their forbidden romance, the violence between the Death Dealers and the Lycans escalates in what may be the final face-off between them.