Originally, he had made a vow to himself that he would never fall in love with anyone in this life. The reason was of course that when he was six years old, he was kicked out of the palace and sent to his uncle's house by his father who thought he was getting in the way of the bedside. But the appearance of that person made him violate his oath again and again, causing him to lose the bet, breaking his oath, and embarking on the road of finding the magical medicine "Wind Bamboo" to extend his life for his royal brother...