When Deidre Johnson fills in for Silver Bay's only police officer for six weeks, she doesn't anticipate facing anything of consequence. She is so wrong. She discovers the frozen body of a Cree Indian girl within the city limits, and in the process of her investigation uncovers a sex-trafficking ring involving native women being transported from Canada and sold in the Duluth Harbor. She is torn between the normalcy she sees around her and the long-kept secret river of young girls that flows through Two Harbors to Duluth.