Follow the story of a young soul lost in the other world, all the people here have lost their memory, and even their identity by extension, they can't even remember their own name.

Each soul must complete a task, given by a strange character in the skull mask. In their ordeal, they will question themselves, they will have to face their empathy, their humanity, their trust in others.

They do not know the task of the others ones, what can worry them, and if one of them must kill another to accomplish this task?