Melinda Moore bumps into engineering student Robert during college, goes into a rage and assaults him physically and verbally, revealing her abnormal tendencies. Later that day, he visits her dorm room to return papers that got mixed up in the previous altercation. On the day of her mother's funeral, Melinda and Robert have sex in his RV and start dating. Melinda later discovers Robert cheating on her with Diana Wells. Enraged, Melinda rams Robert's RV with her car. She passes out from injury and is rushed to the hospital for an emergency full hysterectomy, rendering her infertile. Melinda and Robert reconcile and marry, despite the objections of her sisters, June and Brenda. For eighteen years, Melinda supports them both, as Robert cannot find work because he is focused on developing his invention. Robert talks Melinda into mortgaging their house so he can build a prototype of a revolutionary self-charging battery he has been designing with hopes to sell to
venture capitalist Prescott. Diana, now working as an assistant to Prescott, arranges for Robert to have a meeting with him. After finding Diana's wallet in Robert's truck, June and Brenda tell Melinda that he is cheating on her again. Melinda's family runs a catering business and offers Robert a job, warning him that if they miss out on delivering to a client, they will lose their truck contract. En route to his delivery, Robert gets a call from Diana saying Prescott wants to reconsider his deal. This causes Robert to abandon his delivery job mid-route. Prescott offers $800,000 for the design, but Robert wants to license the technology to them instead and declines the offer. Melinda, furious at both Robert's declining and his interaction with Diana, files for divorce and moves in with Brenda. Robert moves into a homeless shelter, but Diana finds out and insists that he live with her. Prescott later offers Robert a multi million-dollar deal while allowing him to keep the
intellectual property, which he accepts. Robert visits Melinda at work, although she refuses to reconcile. Robert accepts her decision but, as an apology, gives her $10 million and buys back her home. Regretting that she abandoned him, Melinda visits Robert in his new penthouse apartment and attempts to rekindle their relationship, but Diana appears and introduces herself as Robert's fiancée. Furious, Melinda swears to destroy the couple. She sues them, claiming that the deal with Prescott happened before their divorce, but the case is dismissed. The couple file a countersuit against Melinda and obtain restraining orders. As Melinda's behavior worsens, even her family turns on her as they advise the couple to hire bodyguards and install security measures in their house. Melinda eventually chases the couple away. Melinda retaliates by visiting a bridal shop and destroying Diana's
wedding gown with
acid. She is caught and sentenced to court-mandated counseling, where she tells her therapist that Robert took advantage of her. Her therapist suggests that she may have
borderline personality disorder. Melinda's mental state further deteriorates after learning Diana is pregnant. On Robert's wedding day, Melinda's family and friends are forced to prevent her from leaving her house and ruining the wedding. Robert and Diana leave on their honeymoon cruise. Melinda sneaks onto the boat, shoots Robert, and makes the boat's crew jump
overboard. Robert then overpowers Melinda and pushes her in the water, then tells Diana to take the dinghy and rescue the crew. Melinda returns and attempts to kill Robert with an axe. In moving to avoid the axe, Robert accidentally pushes the anchor release button with his foot. Melinda becomes entangled by the anchor's chain, which pulls her into the ocean, drowning her. Diana returns with the crew and comforts Robert. ==Cast==