No one could have imagined that the crimson little fox Qi Zhao brought home, who loved teasing him all day long, was bound to him by fate across three lifetimes. Qi Zhao, who suffers from congenital heart disease, lives alone in a villa halfway up a mountain. By chance, he encounters a sly, clingy red fox and decides to keep it by his side. As the young man and fox play and keep each other company, he casually tries out many playful names for it, until he utters “Ling Jin.” The moment the words leave his lips, the ancient jade pendant he wears close to his body suddenly grows hot. The little fox, which had been lively just a moment before, freezes, and a fleeting look of bewilderment passes through its eyes. The trials of three lifetimes have grown harsher in this life, with both memories and the power to take human form sealed away. Only by waiting for a certain special opportunity can this lifetime's trial reach a perfect conclusion.