The Mystery of the Falling Family

This film (drama)Also known as坠楼迷案，is aMainland ChinaProducerwomen sex，At2012Released in year 。The dialogue language isMandarin Chinese，Current Douban rating4.7(For reference only)。

Li Tianyi, a detective from the Jinghai City Public Security Bureau's Criminal Investigation Team, is a renowned case solver in the province. One day, Tianyi receives a call from his childhood friend Chang Gang inviting him to a class reunion, revealing that a mysterious figure will be present. Since he is on leave and hasn’t attended a gathering in a long time, Tianyi gladly agrees. Tianyi, his girlfriend Manling, and Chang Gang drive to the Golden Bay Hotel in the provincial capital. To Tianyi's surprise, the sales director of this five-star hotel turns out to be his high school classmate Hu Xuesong, who has lost contact with everyone since graduating. Other alumni attending the reunion, journalist Ling Yun, taxi driver Xiao Feng, and IT specialist Zhao Liang, arrive one after another. However, all three visibly show displeasure upon seeing Hu Xuesong, with Xiao Feng making it clear that he dislikes Xuesong. The last arrival shocks everyone except Chang Gang—it's the school beauty Hong Xin, who, like Xuesong, vanished after graduation. After some brief greetings, Hu Xuesong arranges for everyone to rest on the hotel's 13th floor. After dinner, everyone goes about their own plans. Manling asks Tianyi about past events between classmates. It turns out that Hu Xuesong was their class monitor but was not well-liked; he reported Zhao Liang and Ling Yun's early romance to teachers and also accused Xiao Feng of having hepatitis when filling out college applications, which led to Xiao Feng not getting into his desired culinary program. While they are chatting, someone suddenly falls from the building, and they rush to find that the victim is none other than Hu Xuesong. The provincial police quickly intervene, and Captain Zhang Xu invites Tianyi to assist in the investigation. After ruling out suicide, Tianyi accidentally discovers how Xuesong locked himself in his room. The police quickly focused on a few suspects among those attending the school reunion, but the absence of surveillance cameras on the 13th floor, which is used for private resting, complicates the investigation significantly. During the investigation, it is revealed that Chang Gang had an argument with the deceased that night, and a cigarette butt belonging to Chang Gang is found in Xuesong's room, which Chang Gang deliberately concealed. Xiao Feng had previously spoken to the deceased over the phone and threatened him during the call. Zhao Liang had slapped the deceased. All three have no alibi and had motive and opportunity. Tianyi, known for solving major cases, finds himself momentarily stumped in front of several classmates. While chatting with Manling, her ice cream falls from above. Tianyi notices that the position where the ice cream landed is not vertically aligned with where they were chatting. This sparks an idea in Tianyi, and after meticulous consideration, he finally realizes that the real killer is someone else, a conclusion that astonishes him as well. The next evening, at the same time as the day of the incident, Tianyi gathers everyone to reveal the entire process of the case...