13-year old Rachel awakens to find herself trapped in the basement of an abandoned building. Without any memories, or even a clue as to where she could be, she wanders the building, lost and dizzy. In her search, she comes across a man covered in bandages. He introduces himself as Zack and he wields a grim-reaper like sickle.
A strange bond is struck between them, strengthened by strange, crazy promises…
These two, trapped in this strange building, don't know why fate has placed them there...