The last six centuries, three quarters of the world have been ruled by the Zech monarchy. The same family has been in power since the beginning of intelligent civilisation. King Imaya also known as the Immortal king discovered the fountain of youth during the early years of his ruling. Consequently the liquid that enables him to live forever has been the source of his recent unpopularity. The ingredient that creates his unnatural talent has been scarce and the King also known for his ruthless will stop at nothing to find that ingredient. On his journey he meets Liao, a keen young woman voluntarily electing herself for combat.