Father Ross certainly is an original detective; a priest who was once a defence lawyer and is still a wine connoisseur. In the opening scene he seems to be channelling Barbara Pym's Fr. Thames, the unsuitably hedonistic (Anglican) priest. In fact the whole thing is like a cross between a Barbara Pym novel and the film "I Confess" with Montgomery Clift.
There are some very nice touches. At one point Fr. Ross reflects that Pope Benedict looks like Fester from The Addams Family (this seems slightly unfair). Are unconsecrated hosts really kept in a Tupperware box? No reason why not, when you think about it. The best of these is the Red Retreat, run by a shrinking community of nuns. They have a swearing parrot, practise Reiki, and like watching Scandinavian crime series on television.
The plot concerns scandals in the Catholic Church. The scandals are of the expected kind, but there are no lurid details