Year 4018, the Empire of Atellia fell onto the Rebels' hands after a decade-long war. The foolish tyrannical King's daughter, Ethel, found herself in a perilous predicament; despite a desperate attempt to seek asylum at an allied neighbouring country, Ethel was shunned off by the guards and was caught by her pursuers. After hours of torture, she was stripped off her nobility and was scheduled to be sold as a slave at an Auction that will follow several days later.
Bought by a couple of psychopatic Aristocrats who borne a grudge to the former King; Ethel was abused and mistreated not only by her "owners", but also her fellow slaves alike. On the night of the coronation of the new King Noct, the leader of the Rebels; Ethel snuck out of the Baron's Manor to run away from Empire's grasps.
Amidst the dense forest, south of the Empire, Ethel found herself short of breath with symptoms of fatigue showing all over her frail, malnourished body; as she took a shelter onto a nearby cave to rest, a small rift appeared atop her sleeping figure. Moments later, she woke up finding herself dumbfounded in a foreign land.