Prince Keiun's world revolves around the Moon Flower Kingdom's ancient tradition: medicinal baths that cure nearly anything. His sheltered existence shatters during a brutal ambush on an official tour when a girl named Koyo saves his life using unfamiliar techniques he's never witnessed before. Her methods work where conventional healing fails, and her sudden appearance raises dangerous questions. Who trained her in forbidden medicine? Why does someone want the prince dead? As Keiun pulls Koyo into the royal court, their connection deepens across stolen moments and whispered conversations. She carries secrets that could destabilize the kingdom's power structure, and he becomes determined to uncover her past. Political enemies circle closer, palace intrigue tightens, and trust becomes the rarest commodity of all. This drama weaves medicine and romance through a richly detailed world where knowledge itself becomes revolutionary. Expect careful character development, slow-burn attraction, and the constant tension between personal loyalty and political survival. The palace hides more threats than anyone realizes, and Koyo's arrival has triggered something no one can control.