Felicity, in jeans, wellies, and a t-shirt, and Honeysuckle, in a pale blue boilertsuit and wellies, have been sent to tidy up the dungeon. Except they find four buckets of unused gunge. Which it would clearly be criminal to waste. So there's only one thing for it, they both have to get very very messy!
What follow sees the two girls reduce each other to gunge-drenched ruin. Wellies are filled, Felicity's jeans are filled, Honeysuckle's boilersuit is filled, as they steadily cover each other in more and more gloop and goo. Their boots come off and they pour the contents over each other, and remain barefoot for the rest of the scene. Ultimately, they end up sitting in a pool of gunge on the floor, pouring bucketfulls over each other's heads until they are both utterly drenched in technicolour gunge.