Murder at the National Cathedral

The body is found in the cathedral. There are scant clues and no suspects. And to further complicate matters, a parallel crime is committed at a church in England's Cotswolds, where the honeymooners have recently been visitors. Across the sea go the Smiths again, and straight into the center of an ungodly plot of secret agents, a playboy priest, a frustrated lover, a choleric cleric... and a murder so perfect it's a sin.