In the middle of a school exam, jaded student Aria awakens to find herself in a mysterious colossal empire where magical technology thrives, and its citizens whisper legends of a patron god who watches over their world. To her surprise, she has already been selected as one of the candidates to compete to replace the imperial prince Soren, whose days are numbered as the result of an unfortunate magical accident.

As per the empire’s decree, the candidates must undergo three perilous trials to prove their wits and merits to ascend the throne should they survive. Competitors hail from all parts of the empire with aspirations of their own.

Faced with no other choice, Aria must now strive to train alongside other competitors, build her arsenal to gain support from the people, and use her wits to win the title as ruler for the only way to return home lies in the powers vested in the throne.