Billdip Guilty Sins
It's been five years, five years since dipper closed the rift, five years since he defeated bill, five years since they have last been to gravity falls. Dipper is finally 18. After being banned from going back to gravity falls after the Bill incident, they are finally old enough to go back without there parents getting to have a say in it.
But Dippers family aren't the only ones waiting for the twins return, reduced into almost nothing, bill is waiting for his revenge but when revenge turns too love what truly waits dipper.