The end of the world is nigh and the Chosen Sisters must rise to the occasion, yet again! But as the four heroines set out on a new quest, another threat rears its ugly head and the very prophecy that chose them is crumbling apart. How will they weather the return of Galgatax and the rise of the Erudite Empress? And - most importantly - is there cake at the end? Chocolate, whipped cream with those colourful bits, and some nice jam, thank you very much.