A copper coin carrying the regrets and expectations of two fathers (Li Shimin and Lin Xiang) became a bridge connecting the two worlds. The story revolves around "two-way healing" and "mutual growth": modern frustrated middle-aged Lin Xiang regains his passion for life and sense of responsibility through interactions with the little princesses; ancient emperor Li Shimin becomes a wiser and warmer father and monarch through the knowledge and perspective from the future.
