Treasures of the Old Castle

The famous five are spending their vacation at Finiston Farm, located on the site of an ancient castle. The castle has long been in ruins, but the dungeons remain, and there is even some secret passage that the children accidentally learn about from an antiquarian, a descendant of an ancient lineage. The friends are eager to unravel the mysteries of the dungeon – surely treasures are hidden within them. And they hope to find these treasures.