Riddle of the Golden Rat

From publisher blurb: Adventure Framework 29 Riddle of the Golden Rat consists of: A downloadable, bookmarked PDF (8 A4 pages, excluding cover & credits, in both parchment and white backgrounds). The Core Adventure (in this instance, a cursed rat idol shrinks the party to tiny size, then eats them. Can the party survive the innards of the Golden Rat and find their way out?), that will occupy 3-8 hours of session time with Minimal Prep. Rumours & Hooks suggestions.