When your average guy struggling through life in modern day Korea gets "reborn" as a grand prince in the Joseon Dynasty, it seems like a pretty sweet deal, right? Nope, not if you're the younger brother of King Yeonsan, one of the most tyrannical kings in Joseon's history. A reign of terror is imminent, and it's only a matter of time before everything goes downhill. But with a new Grand Prince Jin-seong taking matters into his own two hands, perhaps history won't repeat itself...