During their last days of summer and childhood -- the weekend before middle school begins -- four girls struggle with the harsh truths of growing up and embark on a mysterious adventure.

When Kassie and her friends stumble across an old, broken pocket watch they begin an unexpected journey to unlock the secret of the legendary Garrison Gold. They'll have to solve riddles and follow clues to find the lost treasure. With the help of her faithful dog, Scoot and her gang of misfit friends, Kassie is about to go on the adventure of a lifetime!