High school graduation is approaching, and girl Du Shanying, like most candidates preparing for the exam, is very confused about the future. Until one day, when she went to the library as usual, a letter fell down. From then on, Shanying began to correspond with the mysterious sender. Gradually, a vast universe unfolded before Shanying's eyes, and she decided to apply for the relatively unpopular astronomy department.
During his last spring outing, Shanying accidentally discovered that the Red Feather Lake, known as the "Tears of Sariel", was probably formed by the impact of meteorites on the surface. With the help of Chi Yuanchong, a doctor of astronomy who had returned from studying abroad, the speculation was confirmed, and Shanying became famous in the geological and astronomical circles.
After the college entrance examination, Shanying was successfully admitted to Anfeng University to major in astrophysics. However, something unexpected happened...