以原作13年后为时间线，“单身贵族” 建筑师桑野信介（阿部宽）依旧过着独自一人的公寓生活，期间虽然和早坂夏美交往，最终还是分手收场。进化到令和的不婚男，是否能遇到命运之人呢？

A man's body is found under the statue of a winged kirin in the Nihombashi area of Tokyo. A suspect named Yashima has a car accident and falls unconscious while he is attempting to run away. Yashima's lover Kaori comes from Fukushima and tells detectives that he is absolutely not a criminal. Meanwhile, Detective Kyoichiro Kaga's (Hiroshi Abe) investigates and uncovers a point of contact between the dead body and Yashima. A hidden fact of the victim is revealed which even his children did not know about...