Modern female-oriented romance writer Ying Bai accidentally time-travels to the Qin Dynasty, transforming into a little yellow hound whose inner voice is unexpectedly overheard by Qin Shi Huang, Ying Zheng. With her modern knowledge, she assists Ying Zheng in improving papermaking, fighting epidemics and disaster relief, revitalizing agriculture and promoting education, and turning the tide for the Great Qin. Every time she leaks heavenly secrets, her fur turns white and her life force fades, yet Ying Zheng treasures her like a precious jewel, guarding her in the palm of his hand. She accompanies Ying Zheng through his desolate imperial journey, and Ying Zheng promises her a lifetime of biased devotion. Crossing two thousand years, the engraving of "My Beloved Ah Bai" in the Mausoleum of the First Qin Emperor finally awakens the sleeping soul, and Ying Zheng comes to her side to continue a gentle bond transcending time and space.