After being expelled from heaven by demons, an angel named Evangeline crash lands on Earth. There, she meets Luke, a teen boy who comes to her aid. Without her halo, she has no way to return home. Eva's worst fears come true when she finds out that if she doesn't make it back within 99 days, she will become mortal. Wicked demons try to capture the fallen angel at every turn. As the two face the worst hell has to offer, they forge a deep connection on their journey to return Evangeline to heaven.