The male protagonist of the story takes place in an imaginary future. Because the sun has deviated from its original orbit and is getting closer to the earth step by step. After careful research, the scientists finally decided on the plan to build an underground city, and handed over the special equipment of underground trains to major train manufacturers. When Ye Le met her former high school classmate, the heroine Zeng Jun, when she was applying for a job, they fell in love at first sight. While working as a technician in a train manufacturing company, he encountered a series of strange cases. A temporary worker died unexpectedly, and his own master was attacked on his way to attend a conference. The chief and police officer Aaron also worked tirelessly to find the truth step by step. At the same time, Ye Le himself was wrongly accused and imprisoned. At the same time, the heroine Zeng Jun has always been loyal to Ye Le. Although Zeng Jun's father did not agree at the beginning, the shy love between Ye Le and Zeng Jun developed step by step. The sweet and interesting love between them is enviable. After the construction of the underground city was completed, the day of departure arrived. At this time, the conspirators who framed Ye Le also surfaced, all because of the hatred caused by a death in childbirth and the pain of losing his wife. In the end, he chose to redeem himself. Help the children get on the last train to the underground city.
Intention: Some people stick to their lives for love, and some people finally reconcile with the whole world because of love.