God had made twin worlds; The Caeruleum, the one we live in, and Viridis, a land in which history's greatest prophet never met such a torturous end. The latter was blessed with Angels and Apostles- both following the same two directives; 1. Aid the people walk down the most advantageous path, and 2. When they can no longer do so, follow the protocol
When a Cearuleum-born Aoi Sohara is mysteriously taken to Viridis, the local Apostle of the town she finds herself within begins to follow the first directive to a fault

This story is set in Campeche (Bet you didn't know that one)