"Mirror, mirror, on the wall, who's the fairest of them all?" When the mirror showed a girl with red hair and not the Queen herself, she ordered the thunder beast to take her down. However, will he hurt Yona or protect her?

Finally, the Palace has captured the 'Thunder Beast ', a dangerous and infamous bandit. They isolated him in a dungeon far bellow where darkness is the only companion. A red-haired, lonely Princess gives him food and water every night, and she eventually fraternizes with him. Will he open her eyes and maybe….her heart?