Earning Wings (Again!)

Serena is a young Angel. Or rather, was. After angering the Archangels, she was cast out of heaven, down to earth, and stripped of her powers, status, immortality and wings. However, they promised her, if she can prove to them that she has truly grown, and is ready to return, they will ascend her back to heaven. Only catch, she only has 6 months to do it. They made arrangements, so she will be able to survive, they've made sure she has food and water and heat. But, if she fails and doesn't prove herself in the time limit, she will be a mortal permanently, and even when she dies, she will never go to heaven. This is the story of how a young ex-Angel is trying to gain what she once had. But will she make it?