Michigan Police Chief Laura Frizzo joins forces with Indiana Detective Jeremy Ogden to apprehend the elusive Kelly Cochran, who is responsible for the gruesome killings of her husband, Jason Cochran, and her lover, Chris Regan. As the pair of detectives work to unravel the complex psychological games of the cunning killer, they develop a romantic relationship and eventually marry. Their investigation leads them to uncover a disturbing murder pact between Kelly and her husband, potentially linking them to a series of murders throughout the American Midwest.