Larry may have a way for the girls to get home to 1988… but it's going to require a lot of adult Erin… and Mac may not want to go home to her old life after spending time with Dylan.

Desperate to find a way home, Tiff leads the girls to her adult self, who accomplished so many of her childhood dreams but she isn't everything that was expected. Together they work to decode Larry's ledger as the Old Watch close in.