"Sometimes the one you'd take a bullet for is the one standing behind the trigger."
Adrianne Macroft should have known that no good would come from the letter. Now, she must find out who she can trust, if anyone. What will happen when the ones she trust most are the ones against her?
Dipper and Mabel, now 16, go back to Gravity Falls. Together, they must find out what they are up against, and save the people they love most. When a new villain arises, will this be the end?