In this alternate story, the ancient zodiac worked, but before getting swept back to the Nightmare Relm, he takes the twins with him. Now stuck in the Nightmare Relm with immortality and a different eye, Mabel and Dipper must find a way back to Gravity Falls before the summer ends with the help from an unlikely ally.

After the events in Sock Opera, Dipper is injured from Bill's actions and Mabel questions whether or not she's a good sister.