Abigail and Elias just had the worst day of their lives: burying their parent's after their unexpected deaths. All mourning is put on hold when an irate angel appears in their house and demands their help.
Humanity is in trouble. The seal on the demon kingdom has weakened and if it's not taken care of soon, well...all Hell will break loose, literally. Earth will become the stage for Heaven and Hell's eternal war.
The siblings join forces with the angel, while trying to keep up with the demands of normal life.
Among all this, Abigail begins to suspect their parents' deaths might not have happened the way the police report says they did.