Introducing Riley Spartz, a spunky, clever, and endearing investigative reporter on the trail of a serial killer targeting women named Susan, murdering one on the same day each year. Riley Spartz, TV news reporter for Channel 3 in Minneapolis, is recovering from a heartbreaking, headline-making catastrophe of her own when a longtime police source drops two homicide files in her lap. Both cold cases involve women named Susan strangled on the same day, one year apart. Riley senses a pattern between those murders and others pulled from old death records. She must broadcast a warning soon, especially to viewers named Susan, because the deadly anniversary is fast approaching.