"Semi-retired private detective Molly Murphy Sullivan is suffering from depression after a miscarriage following her adventure in San Francisco during the earthquake of 1906. She and her husband, Daniel, are invited for Christmas at a mansion on the Hudson, and they gratefully accept, expecting a peaceful and relaxing holiday season. Not long after they arrive, however, they start to feel the tension in the house's atmosphere. Then they learn that...

"Molly Murphy Sullivan's husband Daniel, a police captain in turn-of-the-century New York City, is in a precarious position. The new police commissioner wants him off the force altogether. So when Daniel's offered an assignment from John Wilkie, head of the secret service, he's eager to accept. Molly can't draw any details of the assignment out of him, even where he'll be working. But when she spots him in San Francisco during a movie news segment,...

"Molly Murphy--now Molly Sullivan--is a year into her marriage, expecting her first child, and confined to the life of a housewife. The most important decision Molly faces these days is whether the lace curtains need cleaning, and she's restless and irritable in the heat of a New York summer and the enforced idleness of pregnancy. So when a trip to the post office brings a letter addressed to her old detective agency asking her to locate a missing...

Private investigator Molly Murphy goes undercover within the household of a senator and his wife, the latter of whom frequently solicits the infamous Sorensen sister spiritualists for information about her presumed-dead son.