From 1937 to 1952, Chongqing was in the turmoil of war, and the fates of Shizhen and Kezhong were intertwined in the smoke of the times. Shizhen, a female school student, and Ke Zhong, an apprentice in a business, lived and died in the ruins of the bombing and the June 5th Tunnel, which brought the two close to each other in troubled times. However, they were separated due to identity barriers, the appearance of others, and the tide of the times. In the past fifteen years, from the Anti-Japanese War to the land reform, they oscillated between the grinding reality and the attachment in their hearts. After all, the smoke and clouds have passed, and the deep love in the troubled times has fallen into a marriage letter. Staying together in the ordinary way is perfection.