Nail doesn’t believe in the Devil because he has spent the last twenty-two thousand years living in his own personal hell. Nalae Tribunae was born a poverty-stricken Atlantean with no hope. That was before he awakened the demigod powers inside him and the insatiable thirst that came with being a vampire. Not being able to live with the animal he had become, Nail was manipulated by a Source User who had dark intentions of his own. Nail simply wanted his suffering to end, he had no idea that he was opening the door to unimaginable pain and sorrow. For millennia to come he would shrink in horror of the things his new power led him to. The sins of his past. The dark deeds that should have earned him death. That night the Source User transformed Nail into the Primal God of Death and Chaos. He had a demon soul grafted to his own. He became a nightmare. A monster. A Godkiller. Serenity Kornicova is one of the last remaining Atlantean Source Users, but she is being hunted by her own people. After years of unforgivable use of dark magic, she has been marked for death. Serenity doesn’t want to die. She has forsaken the darkness and tried to live her life in the light, but when the warriors of her people close in on her and a new evil is resurrected, she knows she can’t run alone anymore. She seeks comfort in the embrace of the only man who makes her feel like she has a future. Problem is, she is a Source User and that makes her the one thing Nail can’t stand in this world. Nail and Serenity must figure their emotions out, battle Source Users who are hunting them, and face a new evil that has risen from the depths of forgotten history. When the world learns Nail isn’t the only Godkiller, war, love, and fate become a twisted and inevitable force that threaten all the Valhallan Knights. Can the demon learn to love? Can he be forgiven for the horrid things he has done? Can he defeat another Godkiller? Or is the world doomed to suffer for eternity…