How Grandma Got Her Bag Back / Old Haunts New Friends A luggage mix up leads to love when Grandma's luggage is mistakenly taken by a gentleman Grandma met on the plane to Cosmo City. When Grandma and the girls check into the "pocket floor" of a fancy hotel, everything is set for luxurious relaxation -- until a mouse steals Polly's locket. It's a wild chase through the hotel to get the locket back.