On the worst day of her life, Lisa is fired, abandoned, and left with nowhere to turn. Then she summons Lucifer, the feared ruler of the underworld, without knowing that a piece of his lost essence lives inside her. He comes to take it back, but an unbreakable connection traps their fates together. Caught between forbidden attraction and a war beyond the mortal world, Lisa and Lucifer must decide whether their bond will save two realms or destroy them both.