Seven years ago, an accidental Zoë explosion reduced the Kingdom of Thornvalla to ruins. The culprit: Princess Cecilia, but because of Gaia's Law, after overexerting Alke, she lost her memories completely.

Shielded from her past by her grandmother, Cecilia’s wanderlust drives her to the prestigious Lumen Academy of High Sorcery. During evaluation, her power forces the Moonstone into an undocumented, Iridescent light. After retrying, she forcefully throttles her mana down and accidentally registers as a "Pale Blue," the lowest level.

Branded a talentless commoner, Cecilia faces intense mockery and a ruthless tournament challenge from the arrogant noble, Lurella. But alongside her quiet roommate Vivienne, Cecilia must figure out how to survive.