Sung, a bright-eyed orphan with nothing to his name but quick wit and endless optimism, finds himself violently ripped from his mundane life and thrust into a world of frostbitten castles and political intrigue. In this parallel universe, magic weaves through noble bloodlines, and the Northern Dukedom is ruled with an iron fist by the infamous **Duke Jiwon**—a man whose glacial demeanor and ruthless reputation precede him. To make matters worse, Sung bears an uncanny resemblance to **Kang Yohan**, a notorious criminal who attempted to assassinate the Duke. Mistaken for his doppelgänger, Sung is captured and thrown into the Duke’s dungeons, where he must prove his innocence before Jiwon decides to execute him out of sheer irritation. But as the days pass, Jiwon begins to notice something unsettling—this loud, grinning fool is nothing like the cold-blooded assassin he knows. And Sung? Well, he’s starting to think the Duke’s icy exterior might just hide a heart that’s been frozen for far too long.