The protagonist of this novel is Mu Qing, the granddaughter of the Mu family. The personal emotional story revolves around Mu Qing, including family love, friendship, and more importantly, Mu Qing's personal growth story. She had a childhood sweetheart named Zhang Yixin, but he later went abroad. Later, Mu Qing made a new friend—Mu Yanyun, but Mu Yanyun later transferred to another school. When I was in junior high school, I had several good friends including Chen Peiyue, Zhang Yuyun, Zhang Tong, Xu Bing, and Lin Hang. Mu Qing had three good friends in high school named Yu Rongrong, Chen Jinmiao, and Yang Xuehua. Muqing majored in urban rail transit operation management at university, and later took the accounting certificate exam. When I was in college, I just happened to catch up with the school's opportunity to study abroad. After returning to China, he became a maintenance worker in the rail transit industry and resigned after working for a few years. A series of impacts during the epidemic made Mu Qing decide to venture into the world alone, because she knew that this path in life could be achieved alone. Grandpa Mu Chunzhi, grandmother Zhang Ying, mother Mu Yong, and father Pu Tianci also support her to find a better self and be her own light. Although he travels alone, he travels far. At the end of the story, where should Mu Qing go?