We'll Meet Again

The third summer after weirdmageddon, and Dipper is curious about the previous events he'd witnessed those three years ago. Now he was older, he has an even sharper mind. He was just sitting at the attic window, when suddenly, he hears strange, almost familiar voices in the forest...

Billdip, if you don't like, don't read.
Just so you're clear, Dipper is now sixteen, and this story is written in his point of view.