Molly Murphy-- now Molly Sullivan-- is a year into her marriage, expecting her first child, and confined to the life of a housewife. She?s restless and irritable in the heat of a 1905 New York summer. So when a letter arrives addressed to her old detective agency asking her to locate a missing Irish serving maid, Molly figures it couldn?t hurt to ask around. On the same day, Molly learns that five babies have been kidnapped in the past month.