The pines twins and maybe more people meet people from reverse falls. One day Mabel finds a portal right in front of the Mystery Shack, she drags Dipper out of bed to show him, he says to leave it alone but Mabel decides to take a chance. He follows after her into the portal, they land in front of a sign that is supposed to say Welcome to Gravity Falls but instead says Welcome to Falls, Gravity. It was reversed. What will happen when they come across the gleeful twins and pines siblings?All Rights Reserved