This book tells the story of Qiqi and Lulu, who were born in the small town of Locke and have the same appearance, but completely different personalities. In the midst of comparison and hatred, they recognize the reality. With the help of their teacher Lu Qi, they overcome various obstacles and finally become their eternal selves. The plot is simple and not bloody. It is the voice of those born in the 90s and 00s, as well as the confusion and reflection of those born in the 70s and 80s.