Eleanor Seraph was important to the angels' plan to end the apocalypse. The prophecy was to be fulfilled and they sent their best warriors to grab her before the demons could get to her. However, the Winchester brothers were keen to grab Heaven's most powerful weapon out from under their noses. When they crash her twenty fifth birthday party, Eleanor is brought into a life of death and fear. As she fights to be strong enough to take on Lucifer, she begins to fall for another angel hunted by Heaven himself.