(SP Slasher Au) Devil Town is Colder in the Summer Time

South Park sees its first murders in spring, two people found dead. No one charged.

In the summer, the graduating class decides that they will throw together a senior trip to a secluded cabin before they split for good. Their last chances to spend time with the people they've known since they were in elementary school.

They have a lovely trip, until one of them dies, and then another and another.

There's a killer amongst them, but no one knows who. Nobody knows why. And most won't get the chance to think twice. And they can't find a way to leave the grounds...

Or

South Park Slasher AU! One of the people in our cast is killer, and you can find out why. Or you can enjoy their moments before everything falls apart. Or you can enjoy the moments of everything falling apart. And find out who survives, as there really can only be one...

Tw for descriptions of extreme violence, eldrich horror, and spooky times.