In the shadowy research facility known as 'Bus Stop,' a group of armed girls called 'Scavengers' operate. They are dispatched to mysterious realms referred to by the initials 'BP' (Black Parade), where treasures are said to sleep. But what lurks there are otherworldly ghosts...!? Explore! Defeat!! Collect!!! In a bid to gather one million dollars and earn their freedom, these girls embark on a life-threatening journey to scavenge!