Father Greeley's fictional detective, the Most Reverend John Blackwood Ryan, auxiliary bishop of Chicago and amateur sleuth par excellence, becomes involved in another mystery with both theological implications and romantic complications.

Vacationing in Dublin with his niece and youngest sister, Blackie joins forces with fellow Chicagoan Captain Timothy Patrick MacCarthy in an attempt to solve the baffling murder of Irish millionaire James Lark MacDonaugh. Recruited by MacDonaugh's disgruntled and disinherited family and business associates to investigate the cleverly executed homicide, Tim finds himself irresistibly drawn to his prime suspect, the grieving widow.

In order to shield the lovely, fragile Mora Marie MacDonaugh from the wrath of the police, the IRA, and her stepchildren, Tim and Blackie must unravel a Byzantine plot and unmask the real culprit. Once again, Blackie and his ever-expanding band of North Wabash Street Irregulars successfully intervene in a case of passion and death, unraveling a crime and uniting a pair of star-crossed lovers. Vintage Greeley, terrific entertainment with a religious twist.