Middle-aged couple Shen Mo and Tian Yi, facing their third seven-year itch, see their marriage erupt in a bitter clash of accumulated frustration, culminating in a 30-day cooling-off period that seems destined to conclude their relationship.

凡是经过，皆有痕迹。刑事技术警察崔寻走过半个多世纪，与同事屡破大案，这位秉承着“为人民服务”初心的神探，不仅见证了公安事业的发展，更见证了新中国的崛起。