A strange series of occurrences are plaguing the fine city of Canterlot, as one by one, a pony of vengeance strikes seemingly random ponies down in their prime. As the locals try to contain the situation, they find that it soon slips out of their hooves as they discover that this one simple pony might not be as simple as was originally thought. Once Twilight Sparkle and Princess Celestia gets involved, can everyone work together to bring down this threat that threatens to ruin the very core of Canterlot? These City Walls is an exploratory tale about character, relationships, mystery, and the very old, ancient powers that be. And once five innocent ponies get tied up in the lives of each other, a struggle begins to keep the entire city safe for future generations.

This is a primarily OC story. Yes. Run. Run in fear.