Prologue

14 days and 2 weeks before Dipper and Mabel Pines are destined to leave California to spend another summer in Gravity Falls, a mysterious letter is sent to the Pines' residence.
Specifically addressed for Dipper. There is no return address.
An inter-dimensional passageway never has an address.
The Nightmare Realm is everywhere.

I'M SORRY TO SAY BUT THIS IS DISCONTINUED.