The dogs have enjoyed a period of peace, and everything has seemingly gone well. However, the monstrous bear Monsoon soon attacks, seeking to claim Futago Pass as his own. He is driven by a desire for vengeance against Gin, who killed his father, Akakabuto, during the events of Ginga Nagareboshi Gin. Victory is not assured for the dogs, as an aging Gin has begun to go blind. Furthermore, the Supreme Commander Weed is fatally injured by one of Monsoon's kin. Weed's children have been sent away for training and remain oblivious to the crisis at hand. Can the soldiers of Ouu defeat this new take on an old threat? Or is this truly to be their last fight?