The streets of Treasure Town are rumored to belong to "The Cats." They know everything that happens in the city, and no one can cause trouble without dealing with them first. In truth, The Cats are two orphan boys named Black and White, who fear nothing and no one. However, their control over the streets is challenged when the Yakuza arrive in town and begin making changes. The wild Black and the carefree White have no one to rely on but themselves to restore Treasure Town to its former state. Yet their bond is tested as they soon realize that returning to how things were may no longer be possible.