The shadowy figure of a cow is haunting the fields of Dumnien. A curiosity, certainly, but not much to worry about, is it? Until cows start going missing across the province, that is.
Curiosity leads Morgan and Jeremiah to investigate further. The more they investigate, the more they realise that the situation is far more horrifying and sinister than even they could imagine. 
Determined to discover just what has brought the cologoro to Dumnien, and to put a stop to it, the boys band together to tackle the beast.