A copper coin carrying the regrets and hopes of two fathers, Li Shimin and Lin Xiang, becomes a bridge between two worlds. The story centers on “healing each other” and “growing together.” Through his interactions with the little princesses, Lin Xiang, a middle-aged man who has lost his way in the modern world, rediscovers his zest for life and his sense of responsibility. Meanwhile, the ancient emperor Li Shimin draws on knowledge and perspectives from the future to become a wiser, warmer father and ruler.