The Plague of Quentaris

But on the last night of the Three-Day Dark, some said they saw a shape in the starry sky, a black void, where no star shone, a void in the shape of a rat… Is this a warning of fantastical events to befall Quentaris? What part do the rat children, Anton and Vega, play in this horror? Is this the final calamity that will destroy the mighty city?