Half a century has passed since the Crisis, twelve years since the Infection; nature has been turned upside down and the world is a hellish wilderness. Those who remain are penned like sheep in the City at the Edge of the World. Within the City Wall the people live under the protection of the Keeper. But what is on the other side of the Wall and what dark secret is being kept by the authorities? Down on the streets some are ready to stand against the tide, but who is the girl with the mark of the circle on her shoulder? This is a visual novel, full of tension and exciting climaxes. The story is fast-paced with otherworldly elements, strong characters, a thrilling plot and some unexpected twists.