Tulia May lives in rural Nova Scotia with her mother, who works in the laundry of the nearby Ideal Maternity Home. It's a place where unwed mothers can discreetly give birth, a place where adoptions by rich Americans can be quickly arranged. Tulia doesn't think about the workings of the home much; mostly she hates being roped in to helping scrub the endless diapers. Her friend Finny Paul has suspicions that the home is holding sinister secrets—the worst being that unadoptable babies are being buried in butterboxes—but Tulia thinks he's being ridiculous. When Tulia's sister Becky ends up in the home, Tulia truly starts to consider Finny's concerns. And when she and Finny discover what's really going on there, she knows she has to act quickly to keep Becky's baby safe.