Listener discretion is advised.

Though it was early summer, there was still a chill in the water

when Esco Johansson arrived at Lake Bodum on June 5th, 1960.

It was the Sunday of a holiday weekend,

an Esco lived nearby the lake in the town of Esbu, Finland.

He was headed for a swim around 11am.

It was typical for locals to spend their weekends out on the lake once the weather warmed up

and the sun came back after months of perpetual night.

Esco turned off the road and trekked through a short patch of woods towards the lake,

and in the distance about halfway between the road and the water, he saw a tent.

That's strange, he thought.

It wasn't common, nor particularly safe for people to camp in these woods.

At first, it looked like whoever was camping there had given up on taking down their tent.

The site was a mess, belonging strewn everywhere, and the tent was mostly collapsed.

He thought he'd check it out, but as he got closer, something didn't feel right.

Lying on top of the tent was a boy, about 18 years old, with blood on his face,

looking as if he had gotten into a terrible fight, and underneath him,

a tangle of three other bloodied bodies.

Esco couldn't make sense of what he was seeing.

His mind was in panic mode.

When all of a sudden, the boy on top of the tent took in a sharp breath.

Help me, he gasps, and then falls back unconscious.

...