Kai Novak chose to save a life that night and now, thanks to the alluring Sterling Valkyre, her life will never be the same. After meeting at a club one night, Sterling brings her friend to Kai's door-and he is covered in blood. Kai is able to save the young man's life but not without questions. As the night unfolds, she forces Sterling to tell the truth-Malachi is an angel and Sterling is Nephilim. Not willing to believe the story being laid out in front of her, Kai is pulled into the land of Soteria where Sterling is determined to prove that she was telling the truth. It is here that Kai meets a host of character who, like Sterling, are sworn to protect the mortal world from an unseen eternal battle.

The longer Kai remains in Soteria, she can't help but notice her growing feelings for Sterling-feelings that she has come to learn are forbidden. Sterling once welcoming and cheerful, begins to pull away but that is the least of Kai's problems. When her forbidden presence is discovered in Soteria she must make a choice-to let her new friends suffer punishment for breaking the law or to face Metanoia an ancient Nephilim trial. With the help of her friends, and a reluctant Sterling, Kai must establish herself among the Nephilim in order to prove she is strong enough to overcome the chaos of Heaven and Hell, or die trying.