A respected college literature professor whose carefully controlled life unravels when she begins a secret affair with a vulnerable student. As emotional boundaries blur, she becomes entangled in an increasingly volatile triangle involving her student and her sister-in-law. When her husband, a homicide detective, begins uncovering the truth, the situation spirals into betrayal, obsession, and ultimately a fatal confrontation that exposes how far each of them is willing to go to protect desire, pride, and control.