The special homicide case that was unsolved in 1997 resurfaced 13 years later. Criminal policeman Wei Zhengrong, who wasn't able to find out the real murderer that year was traumatised and left the front line. The once fledgling new policeman Lu Xingzhi grown from his innocence and has become a meticulous criminal investigation expert. The many coincidences of the case brought the master and apprentice together again to hunt down the real culprit.
In the 1960s, Guo Xiaolu and Su Lingfang met for the first time. They should have grown up together because of an accident. The never-arriving letter allowed the two to embark on a different life trajectory and opened the fate of a lifetime. The reunion after a long absence coincided with the prosperity of the two. Ding Mengmeng (Li Tingting), Wang Xiaomo (Wang Xiaokun) and Wang Qingwei (Xu Weihao) were also accompanied by them. As the years passed, the fate of a generation was ups and downs in the torrent of the times. After Guo Xiaolu reunited with Su Lingfang after life and death, they made an unexpected choice.
Hotel manager Zhang Wei finds his life changed after meeting the warm and kind Luo Xi, sparking an unexpected romance. Meanwhile, Tao Lun, secretly in love with Luo Xi, focuses on his career and finds love elsewhere. When a powerful hotel group threatens the natural landscape, Zhang Wei and Tao Lun join forces to protect it.
After graduating from college, Chen Keyi has always dreamed of making it in the big city. She has already made plans with boyfriend Yang Dahe but family issues cause the two to breakup. Left to fend for herself alone in Beijing, Chen Keyi feels the vulnerability of having no one to depend on. She decides to change her name to Chen Ke in hopes that it'll help her become stronger. One step at a time, Chen Ke evolves and matures through her multiple career changes in her journey through life.
The movie follows a group of freshmen in college as they navigate through the wild days of friendship, pranks, and love. ~~ Based on the song written about friendship growing apart after college.