It is difficult to tell who is consulting with whom when Sherlock Holmes comes to the aid of Father Dowling. The pair prove to be an unbeatable team as they put their powers of deduction to the supreme test as eyewitnesses to multiple murders. There's only one hitch: No one other than Dowling can actually see Mr. Holmes!
Trouble is brewing for Father Dowling when his evil twin brother rolls into town. Blaine manages to frame his brother for a bank robbery, while protecting himself with a perfect alibi: He's been arrested for overdue parking tickets. With the help of Sister Steve, Father Dowling masquerades as his troublesome twin in order to track down his underworld associates.
Father Dowling does his duty, jury duty, in a murder case that should have been open and shut. Father Dowling is not so sure and his claim of reasonable doubt ends in a deadlocked jury. While the DA angrily works toward a retrial, Father Dowling and Sister Steve conduct an investigation of their own, at the center of which is the testimony of an eyewitness who seems to keep company with some unusual sorts.
Sister Steve's return to her Mother's house to celebrate the convent's Silver Jubilee ceremonies should be a time of great joy for everyone. But shortly after arriving the Sister discovers a nun with a gun. Not quite what she expected. And her worst fears are indeed realized when another visiting nun is murdered.
Everyone is enjoying the slice of Hollywood as a movie crew uses St. Michael's as a location, until a series of unexplained, and life-threatening, accidents put a damper on the mood. Father Dowling and Sister Steve are enlisted to assist in the investigation while Father Prestwick decides to make his screen debut...as a stand in.
A showy showgirl of a shady nightclub is surprised to discover that her late husband's estate consists of nothing but debts. Or is she the victim of a scam to deprive her out of a small fortune? The investigation reveals a motley crew of underworld characters as Father Dowling and Sister Steve go hunting for a suspect.