The year is 1891 and a Catholic priest arrives at 221B Baker Street. However, he only utters two words, "il corpe", before suddenly falling to the ground dead.

The police doctor attributes the man's death to cholera, but when Holmes learns of another priest with similar symptoms, he suspects that they were both poisoned. He and Watson discover that the victims have been sent from the Vatican to verify a miracle - the body of the eighteenth-century philanthropist and slaver, Edwyn Warwick, is said to have not decomposed in the grave.

But should the Pope canonize a man who got rich from slavery? And then when Warwick's body is stolen, it becomes abundantly clear that the priests' mission has attracted the attention of a deadly plot...

Another case of one of the most popular characters in world crime literature is brought this time by Cavan Scott, the author of many bestsellers and TV shows.