The Grunkles still at sea keep contact with the twins until one day they never respond. Not to worried since the Grunkles get out of range a lot. Mabel and Dipper, now 18, return to Gravity Falls. The Grunkles promised they'd be back to Gravity Falls by the time the twins return. The twins return but the Grunkles do not. Communications are completely dead, except one jumbled message. Will Dipper and Mabel find the courage and strength to over come the obstacles ahead and find their Grunkles. Or will their be two sets of Pines twins lost at sea? Will an old for be the problem? (Gravity Falls and its charters belong to Alex Hirsh and the people who worked on the show.) *None of the art is mine.