On the night of August 24th, 2007, a 31-year-old office worker left her job in Aichi Prefecture, Japan… and never made it home.

Her name was Rie Isogai.

She had no enemies. No dangerous lifestyle. No warning.

But somewhere else in the city, three men were refreshing a message board, an underground corner of the internet known in Japan as a “dark site.”

They weren’t friends.
They had never met in person.
But that night, they agreed on one thing:

They wanted money.
And they were willing to kill for it.

This case would shake Japan, not only because of its brutality, but because it forced the country to confront something new.

Strangers meeting online.
An anonymous digital world.
And a murder born from a website.

It would become known as the Dark Site Murder.

And in a country where the death penalty is rarely applied to a single killing… this case would test the limits of justice.

In Part 2, the case moves from investigation to trial.
This episode walks through the courtroom proceedings, key witnesses, and the emotional impact statements that brought the case to its breaking point. As the judge delivers the verdict, the question remains: was this a tragic accident, or something far more deliberate?

For our Season 9 finale, we step outside of Asia and head to the United States.

In the summer of 2022, a devastating car crash in Ohio claimed the lives of two young men: Dominic Russo and Davion Flanagan. What first appeared to be a tragic accident would later be re-examined, investigated, and ultimately prosecuted as intentional and as murder.

This episode marks the beginning of a two-part deep dive into the McKenzie Shirilla case, a story that gripped me from the moment I encountered it. Teen car crashes, sadly, are not uncommon, but something about this case feels different. The evidence, the behaviour, the courtroom strategy, and the unanswered questions all demand careful examination.

This case is about a man named Leslie Khoo, who was a married man, a repeat offender, and someone living a double life.

In July 2016, during a heated argument inside a car, he strangled his girlfriend, Cui Yajie, a woman with whom he was having an extramarital affair.

What followed was an attempt to erase her existence.

Over the next three days, Khoo transported her body to a forested area in Lim Chu Kang, where he burned her remains in an effort to destroy all evidence.

He was arrested on 20 July 2016.

Three years later, despite the absence of a body, Khoo was convicted of murder and sentenced to life imprisonment, making this Singapore’s second murder conviction without a body.

In this episode today, we explore the chilling series of unsolved poisonings known as the Paraquat Murders or the vending machine murders, where an everyday convenience of accessing a quick drink became lethal, victims were chosen at random, and a nation known for its safety was gripped by fear.

With no arrests, no clear motive, and no single suspect, this case remains one of Japan’s most disturbing mysteries, a horrifying reminder that even the most ordinary moments can hide something deadly.

It was 30th December, 2000, four members of the Miyazawa family were murdered inside their home in Setagaya, Tokyo, Japan.

The case remains unsolved.

The investigation identified the killer’s DNA and uncovered numerous clues about their movements and behaviour inside the house.

None of it has led to an arrest.

What happened on that night? Why was this family targeted? And why did the perpetrator get away with it, whilst so much evidence was left behind....

Tonight, we travel to the quiet, forested island of Pulau Ubin, Singapore, a place that feels frozen in time, where the jungle hums, the quarry lakes shimmer, and the past refuses to stay buried.

Hidden deep along a dusty trail stands a shrine unlike anything else in Singapore. It’s filled with dolls, lipstick, perfume, and offerings meant for a young woman whose real name… we still don’t know. Some say she was running for her life when the British came to arrest her family at the start of World War I. Others believe she slipped, fell, or perhaps chose her own fate on the cliffs above......

In the quiet suburbs of Tokyo, children played under the warm summer sun… blissfully unaware that a shadow was watching.
A shadow with two faces.
A shadow with a hunger that no one understood.

Before Japan knew his name, they only knew the disappearances…
the phone calls with nothing but ragged silence…
the letters… filled with unspeakable things.

This is the horror story of one of Japan's horrifying monsters