Jax, a son of Hell, and Sasha, a descendent of Eve, unexpectedly find love, but Sasha must sacrifice the purity of her soul to save him while he struggles to keep her safe from his brother Eryx, whose mission is to take over Hell and abolish humanity's free will.

Sasha is desperate to find out who murdered her father. When getting the answer means pledging her soul to Eryx, she unlocks a secret that puts her in grave danger - Sasha is an Anabo, a daughter of Eve and Eryx's biggest threat. A son of hell, immortal and bound to Earth forever, Jax looks for redemption in the Mephisto Covenant - God's promise he will find peace in the love of an Anabo. After a thousand years, he's finally found the girl he has been searching for: Sasha. With the threat of Eryx looming, Jaz has to keep Sasha safe and win her over. But can he?