Rachel, 13, awakens to find herself in the basement of a deserted building. She no longer remembers anything and is unsure of her location. She encounters a mysterious boy named Zack as she makes her way through the building alone and confused. He has bandages covering every inch of his body, holds what appears to be a grim reaper's sickle. Zack and Rachel gradually form a peculiar friendship as they work to get out of the building where they are both imprisoned.
