A medical thriller about a fertility counselor who goes on a killing spree of barren women in the warped belief that this "act of mercy" will save them - her "sisters" - from a life of suffering. The serial killer, who hides her crimes by making them look like accidents or suicides, is uncovered by a suspicious and persistent clinic RN and her reluctant-but-efficient deputy sheriff roommate. In the process, the female nurse/deputy team also exposes unethical practices by the fertility clinic's MD owner-operator.