After a massive bout of overeating, five year old Airy wakes up with more than just a stomachache, she’s regained the memories of her past life as a righteous, Taekwondo trained kid from Korea. Now, armed with a black belt’s discipline and a fierce sense of justice, she realizes she’s destined to be the world’s “Purifier” to prevent a looming apocalypse.

Airy’s mission starts at home. She’s no longer the timid child her family once knew; she’s now a tiny powerhouse who handles bullies with a Hectopascal Kick and treats her villainous father, Grand Duke Declan Ortezo, with the polite, yet hilariously distant formality of a seasoned adult.