In a postapocalyptic future, a human girl and an android travel the world in search of a mythical utopia to protect those they love.

Nearly 200 years after the destruction of humanity in World War III, Roue lives a happy life exploring the ruins of civilization with her "uncle," a robot named Zett. But when their peaceful life is threatened, Roue must trust the mysterious robot Chrome to bring her family together again.

Roue continues her journey to Heaven Land under the protection of Chrome and Rock, but her very existence has put Heaven Land in a difficult position. Unable to reach an agreement, the Heaven Land administrators dispatch two teams to intercept the girl--the Donkeys, who they've assigned to welcome her, and the Elephants, who have been ordered to eliminate her and her comrades. The race is on to find out which group will decide Roue's fate!