The Fallen Angel Locked Out of Heaven, Trapped In Hell

Years after the Intergalactic wars the Earth was a chaotic mess, the few survivors left tried to make their own small society. But no one trusted anyone, anyone was an enemy or a possible enemy. But among all that darkness, there was a light. In Estrella's small town there is an enemy organization called the Terra Foundation that preyed on its victims in the night causing mass murders keeping most people indoors. While her grandfather could not stand for this he had grown too weak in his old age to fight anymore. So Estrella took it upon herself to go after them herself, while gaining a few friends on the way they came face to face with the head of the Terra Foundation. Would they succeed in taking back their freedom? Or would they fall in an endless despair of what had become their hell on Earth?