Ben has to spend every Friday at his grandma's house while his dance-crazy parents hit the dance floor. Ben's grandma is nice, but so boring! All she ever wants to do is play Scrabble and she eats nothing but cabbage soup all day long - yuck! But one day, Ben discovers that his grandma has a secret: she used to be a famous jewel thief! And now she is planning her biggest heist yet: she wants to steal the crown jewels of the English queen! Ben is thrilled. What an adventure! From now on, Fridays can't come fast enough.