In Durham, England, on a sabbatical. Father Flenn is present when a poisoning in the city's cathedral shocks the public. The fact that it is not the only such attack in England makes the authorities talk terrorism but where is its origin? A resurfaced IRA is one suspect. Russia is another. Flenn decides to try and find out himself, along with his old friend Zack. Zack is in the area for a problem all of his own.