Outside the walls

This is a story about a time where demons arise from hell and take revenge on humans for banishing them to the pits of hell. To survive only the most powerful and richest could live in the santuary's. Places surroned by walls that where protected from the demon's attacks. But the rest of humanity was forced to live in wastelands. Nobody in the santuary knew what happened outside the walls or if anyone outside was alive or what where the demons doing.