Lin Wan, a 16-year-old astronomy girl, unexpectedly meets Jiang Che, an aerospace researcher who lives next door when her family is falling apart. The two became connected due to a rooftop telescope accident on a rainy night: Jiang Che crashed Lin Wan's cherished telescope, but during the repair process, it was discovered that the "Comet Handbook" she recorded contained asteroid data (SW-709) that had not been paid attention to by the academic community.
When Jiang Che's mentor plagiarized the data, Lin Wan fought back with the original records in his handbook, which revealed a deeper family secret. During the divorce proceedings, his mother revealed that Lin Wan was not his biological father, but his biological father was actually an astronomical engineer who retired due to academic stains twenty years ago. At the same time, his younger brother Lin Chen transformed from a destroyer to a guardian. He was seriously injured while protecting his sister in the data battle, awakening the conscience of his parents.
In the end, Lin Wan confirmed the right of discovery at an international conference with a homemade spectrometer, and SW-709 was named "Lin Wan Star"; Jiang Che gave up the opportunity to study at MIT and stayed at a domestic research institute to promote the juvenile astronomy project. On the day Lin Wan was admitted to the Astronomy Department of Peking University, the two of them saw the asteroid ring in the restored old telescope - it was the starlight echo that the universe gave to those who persisted after passing through the long dark night.
Purpose: Tell the story of Lin Wan, a girl from a broken family, and Jiang Che, an aerospace researcher, who redeem each other through astronomical observations, and ultimately cultivate starlight in the cracks.