The plot revolves around Selene, a powerful vampire warrior whose goal is to eradicate injustice and inequality in society. In the centuries-long struggle between her people and the werewolves, she is known to be one of the most effective and well-trained assassins in existence. In addition, she has a determination and a series of qualities that make her practically invincible in the melee. However, her life will take a radical change when she falls in love with Michael Corvin, a human who finds himself trapped unwillingly in the middle of the confrontation between the two clans. Bitten by a werewolf, he quickly becomes one of them. Between passion and duty, the protagonist will have to make the decision to choose her true side before it is too late. At the same time, she will discover some very revealing secrets about Corvin, as well as about the members of what she recently believed to be her family.