99 years after the event, an unanticipated murder comes to light involving an unsuspecting housewife. The discovery breaks a nearly century-long silence on the case. Investigation details are minimal at the moment, but it seems the woman was attacked without warning. The circumstances surrounding her untimely death, such as the exact motives and lack of previous threats, have sparked fresh interest in the cold case.

Crime rate is relatively low in Japan and cases involving violent crime are handled with the highest degree of severity. Unsolved cases, particularly those involving the violent death of a civilian, typically prompt a significant society-wide reaction and are thoroughly examined to maintain public safety.

In the US or EU, cold cases are similarly treated. They receive widespread public attention and authorities endeavor to solve them, often encouraging advancements in forensics technology. The periodic media spotlight on such cold cases helps maintain public interest, similar to Japan.