Min-hoo, who was thought to be loved by his stepmother, wondered around a winter pond after hearing the news of her divorce and fell into the pond. And as his eyes opened, he woke up on an unfamiliar world called "Yubrade" and Emperor Sioen declared that Min-hoo would be the savior who would save Euphrates from 'revelation', calling Minhoo the 'Moon Savior' Min-hoo fights to overcome fate in order to get back to Earth from this a strange underworld...