Zhang Yifan, an English major at the School of Foreign Languages of a prestigious university, is a beautiful academic girl with a bright future. Because of his youth, he met unkind people, got married and had children with an old scumbag, was dumped, and left the house. During a relaxing trip, I met Xi Heng, a student at the School of Architecture at the University of Madrid, a sunny boy who grew up in love and freedom. From the first time we met on the same flight to the subsequent deep attraction to her, we created opportunities for "accidental encounters" along the way and guarded her silently like a little wolf dog. A scarred heart was slowly warmed up. However, the difference in age and experience between the two made the two close and yet blocked each other, making breakup inevitable. It was not until two years later that the two remembered their agreement to live in a tent and watch the stars together, and finally met in the Thar Desert of Lagasta.