Lucis' kingdom houses the world's last remaining Crystal, and also the empire of Niflheim is decided to sneak it. King Regis of Lucis controls an elite force of soldiers called the Kingsglaive. They struggle to protect Lucis. Since the military might of this empire conveys down, King Regis is up against an impossible ultimatum -- Prince Noctis into Princess Lunafreya of Tenebrae, captive of Niflheim to wed his son, also surrender his lands to Niflheim rule. Although the king concedes, it becomes clear that the empire will probably stop at nothing to achieve their objectives that are devious, with the standing between them and world domination.