As far as twelve-year-old McKinley O'Dair is concerned, the best thing about living in Gap Bend, Pennsylvania, is the Time Hop--the giant party the town throws every June to celebrate a single year in history. That one day is enough to make the few things that aren't so fantastic about McKinley's life--like her crabby homeroom teacher or her super-scheduled father--worth suffering through. And when McKinley learns that this year's theme is 1993, she can't wait to enter the Time Hop fashion show with a killer '90s outfit she's designed and sewn all on her own. But when the Time Hop rolls around, nothing goes as planned.