A young man is transported to another world where he helps to rebuild its flagging economy.
Julius, the son of Gaius, attempts to reclaim his former territory of Van from Souma, backed by the authority of the Gran Chaos Empire; the power to negotiate is given to Jeanne Euphoria, the younger sister of Empress Maria Euphoria.
Van is returned to Julius as a result of the mediation of the Grand Chaos Empire.
Royal Guard Captain Ludwin's childhood friend, Genia, was a rare breed of mad scientist; her inventions leave even Souma, who comes from a world of science and technology, in astonishment, in addition to being utterly dumbfounded.
Van is returned to Julius; the people's dissatisfaction increases until they revolt.