Howard Parker is a multi-millionaire real estate developer with many projects in the works. The project that he is the proudest of is Harmony Hills, the ritzy country club development that he and his wife, Olivia call home. Based in Scottsdale Arizona, Howard and Olivia live a seemingly perfect life, along with their best friends, Matthew and Vanessa Lancaster. Matthew is a cardiac surgeon, while both his wife, Vanessa, and Howard's wife, Olivia, have a penchant for interior design. Scottsdale seems like the perfect place for both families to raise children until a mysterious woman comes to town and begins to wreak havoc in their lives. This woman, who works as a nurse at the hospital, is driven by a deranged and relentless desire for revenge. Once the truth is revealed and the woman's intentions become clear, both the Parker and Lancaster families discover that they are in more trouble than they could ever have imagined.