A fallen angel happens to glimpse an angel slipping back into Heaven through a portal. They manage to slip through, right before it closes. However, as the fallen aren't supposed to be in heaven, they're hurt by their travel into their previous home. The angel who went through the portal is obligated to take care of this fallen angel, but because the fallen aren't allowed in the Deity's presence, they both have to remain on earth.
While they're stuck together for the allotted time of a week and a half, they find that the Deity is an archangel posing for the Deity, holding Heaven together until the Deity returns.
Our job, as the fallen and the angel, are to somehow find common ground and find this Deity.
I'd like to be the fallen angel, but if you have a strong leaning toward them, I can be the angel. I will also be the rest of the angels, so as to move the story along.