Outside of the prestigious Yatter Kingdom is a country of poverty. There, a young girl named Leopard learns that her mother, Dorothy, and her two close friends, Voltkatze and Elephantus, are direct descendants of the Doronbow Gang; Doronjo, Boyacky, and Tonzra, whose battle against the Yattermen long ago led to their people becoming exiled and living in poverty. Dorothy encourages Leopard to become a good girl and not become a villain like her ancestors. However, on the day of Leopard's ninth birthday, Dorothy develops an illness that cannot be treated with their country's medicine. Wanting…