If you need a description, go read books 1-3 . If you don't feel like reading those books, be prepared to be extremely confused.

If you want a summary, check out Guardians. Other wise you will be very confused anyway.

Continuation of Guardians if you want a description read the first book if you haven't haven't done that by now I'd suggest it or you won't understand.

(A collaboration story with @jfagirl130 who happens to be my real life friend.) The Angels are looking for a piece. If they can't find it in time the entire human race will die. Rachel is a clue. She and the Angels don't know why but they know she is. But they aren't the only ones after it. The angel team is also against the demons. Will they be able to save the world?