Quaker midwife Rose Carroll hears secrets and keeps con­fi­dences as she attends births of the rich and poor alike in an 1888 Massachusetts mill town. When the town’s world-famed car­riage indus­try is threat­ened by the work of an arson­ist, and a car­riage fac­tory owner’s adult son is stabbed to death with Rose's own knitting needle, she is drawn into solv­ing the mys­tery. Things get dicey after the same owner’s mis­tress is also mur­dered, leav­ing her one-week-old baby with­out a mother. The Quaker poet and abolitionist John Greenleaf Whittier helps Rose by lending words of advice and support. While strug­gling with being less than the per­fect Friend, Rose draws on her strengths as a counselor and prob­lem solver to bring two mur­der­ers to justice before they destroy the town’s carriage industry and the people who run it.