Trouble looms for the Goffins when archaeologists find Roman treasure under Grandmuppy Closter's home. Can George keep the Goffins from being found - or will Grandma come to the rescue of their secret attic neighbours? Lofty and Eave's family have to move out of their belfry home - and fast. 'Olden-day diggers' are coming to excavate Roman treasure, and the Goffins can't afford to be caught. But with Grandmuppy Cloister too old to walk, how are they going to get to their new home? The Goffins have a plan, involving a meeting with Arch at long last - but with George and Rex helping out, things don't always work out as planned. Might Grandma save the day?