Out of the blue Angel is contacted by his mother who is living a semi-bohemian life in darkest Suffolk. She is concerned about one of her neighbours who has decided to fund a private archaeological dig on his own farmland, convinced he will find the remains from Queen Boudicca's royal mint. There have been sinister accidents on site and several diggers have been attacked, so the Angel decides he must infiltrate the dig - only to discover it has already been infiltrated by individuals intent on finding a grave far more recent than the Iron Age...