The first love that was supposed to be over… begins to move once more. Tianna, who became a court apothecary to save people, leads a busy yet fulfilling life, taking great pride in her work. Her dedication and compassion toward her patients earn her a promotion, but soon after, a “special mark” appears on her body. That mark signifies that she is the fated mate of Emperor Saphir. As the entire palace launches a search for the one bearing the mark, Tianna decides to hide her identity in order to continue working as an apothecary. However, at that very time, she is appointed as the emperor’s personal apothecary, serving the ever-busy Saphir himself…!? A love story between an emperor and a court apothecary, divided by their difference in status, begins!