“Are you… completely lacking in reproductive capability?” Baek-rim, the Emperor of the Ye Kingdom, lost all carnal desire after being poisoned in his youth. When his royal physician heads deep into the mountains to find a legendary medicinal herb, he suffers an injury and sends his younger sister, Seol-young, to serve the Emperor in his stead. “I have one request, Your Majesty.” “Speak.” “Please allow me to… personally verify your body’s physical response.” The Emperor, known to many as a "Ghost" for his coldness, welcomes Seol-young with an unexpectedly beautiful smile and chilling kindness. Despite her role as a temporary physician, Seol-young finds her heart wavering in his presence…