Adrina has spent years pretending to be her deceased twin brother ever since turning eighteen. Feared as the ruthless “Mad Dog” of Palesa Palace, she is ordered to serve as the protector of Duke Julius. However, something about the mission feels strange from the start. The duke is supposed to be older than she is, yet his appearance tells a completely different story. Instead of a mature nobleman, Julius looks no more than a young child. This unexpected mystery leaves Adrina questioning everything she thought she knew.