After a rev-tasting trip through Beanotown centre, Gran’s motorcycle gets impounded. 

Now, with her main set of wheels confiscated by Sergeant Slipper, Gran has to start acting her own age – lawn bowls, pie-baking, feeding the birds, and even knitting! 

Dennis and the gang find a solution, with Wilburcorp’s new anti-aging cream. But after a nasty surprise from Walter, Dennis gets tricked into using aging cream, instantly becoming an old man! 

It’s time for Gran and the gang to Gran Up - you can take her bike, you can take her board, but you can’t take her boy!