On February 19, 2005, a 25-year-old woman left her home in Osaka, Japan, to meet up with a man she had been messaging online for the past few months on an online suicide club. Michiko Nagamoto had been suffering for depression for a while, and had considered suicide a couple of times. During her conversations with Hiroshi, they entered a suicide pact, and began preparing for the day they would go ahead with it. Hiroshi told her to make sure she left a suicide note for her family, and urged her to delete their correspondences before they met up on February 19. While she did write the note, Michiko either forgot or chose not to delete the emails.

What she didn't know was that the man she was going to meet had no intention of going through with a suicide pact. He was, in fact, Japan's newest serial killer...