"Alex" Ashley gasped. It was beautiful. The ring, it was beautiful. A moonstone. His was a sunstone. She fell in love with the gems her and her husband would call their son and daughter. They were never able to find out what they were but she raised them like humans, glad most people ignored their bizarre appearances. One summer, it was secretly decided they needed to find their own kind at some point. They sent Dipper and Mabel to the likeliest place they'd find others like them. Gravity Falls.

What would happen if something went terribly, terribly wrong that fateful night in the Mystery Shack when Stan's portal was discovered? In this fic, Dipper and Mabel end up in the Unknown and meet up with Greg and Wirt, both teams of siblings trying to find their way home. This fic takes place after Not What He Seems (GF), and at the beginning of OtGW. (cover by BottleWonderland : http://bottlewonderland.deviantart.com/art/Over-the-Gravity-Falls-499261747)