For over 511 despicable years Heddwyn Ploryn kept a beast in his attic, feeding it all sorts of things, and in return the beast would vomit him up expensive presents.

Now the beast has gone, and Betsan is here – and she’s determined that she and Heddwyn are going to De-Beast their lives and Do Good. But Betsan is finding out that no-one trusts a notorious prankster (even a reformed one) and Heddwyn is starting to miss the beast’s vomity gifts. And from a very unexpected place, someone is watching. Someone hungry…