It had been three years since we last stepped foot in Gravity Falls. I don't know why but our parents never took us back. I missed everyone back there. Especially Wendy. I had always dreamed of going back...but...not like this. Our parents started fighting, and one thing led to another, and they decided to get divorce...
Oswald, Mickey, Felix, Bendy, Cuhead y Mugman se han encontrado y con la ayuda de alguien más derrotaran a la criatura que quiere destruir sus mundos.
Cada uno con diferentes historias. Cada uno con el mismo sufrimiento, pero obtenido de distintas maneras. Cada uno con un pasado tortuoso, el cual los perseguirá para siempre.