When Hell is plagued by overpopulation and exposure of their world to humankind seems imminent, angels and demons come to a rare accord. They decide that their half-mortal offspring will be the perfect soldiers to cull these rampant ranks of evil souls.

Introvert Lana's mundane life takes a terrifying turn when she is forcibly taken to the Underworld. There, she not only faces Hell's lethal minions but also draws the dangerous interest of the archdemon Ashtaroth, an ancient being willing to kill anyone who stands in his way.

While Lana fights the lust he stirs within her, unwilling to damn her principles for the gorgeous creature, Ashtaroth plots ways to bind her to him. To his delight, they soon find themselves united on a mission.

Will Lana survive working with the demon who is intent on conquering her, or will their differences bring them closer in a way they never imagined?