Meg is excited when she hears the Centennial Strawberry Days Celebration is holding a competition for kids. The winner will be crowned the official Strawberry Days Ambassador and get a pair of electric bikes! Meg knows with Dad as her partner, there's no way she can lose.

But Meg's strawberry dreams turn sour when Dad can't participate and, worse, he's already invited Grandma Sally to replace him. Without even asking Meg! Grandma likes to play by her own rules and Meg realizes her chances at winning are at an all-time low.

For Meg this means war! Only, Grandma is tougher than she looks and willing to give as good as she gets. As the competition begins, it becomes clear that Meg's summer will have the most epic showdown ever.