In 1984, Japan was shaken by a chilling criminal case that felt like something out of a horror film.

A group calling themselves “The Monster with 21 Faces” began blackmailing candy companies, threatening to poison their products, and sending taunting letters to police and the media. Despite massive investigations, a suicide, and national panic—no one was ever caught.

Who were they? What did they want? And how did they disappear without a trace?

In this episode, we unravel one of Japan’s most infamous unsolved mysteries—a case that still haunts the country to this day.