Heaven is Unjust

Winnie is a soul that died in the early 1900's. Tragedy strikes when Winnie and her best friend part ways in the after life. Winnie discovers that her friend would not be joining her as a soul in Heaven, but as a sinner in Hell.
After many years in Heaven Winnie discovers that the Archangels are opening a recruitment program, allowing souls from Heaven to live in the Celestial Realm for one year to see if they are eligible to become an Angel. Problem is, the Archangels are withholding secrets that make Winnie's time harder than it should be. Winnie discovers secrets and the real reason the Archangels are looking for more Angels.
A war.