All of Beanotown has been invited to witness Walter's family's collection of solid gold. 

Even Mrs. Creecher gets an eye test, with Professor Screwtop’s new tech-specs, to make sure she can see the collection. 

But when the lights go out in Walter’s vault, the whole collection has gone missing. And with the only evidence being a muddy footprint and a lock of black hair, the signs point to Dennis as the thief! 

However, Creecher's new tech specs lead both her and Slipper on a chase to try and find Dennis and the gang, as they scour Beanotown to try and find the gold thief.