Dawn O'Keefe serves as a spokesperson for a teenage abstinence group and begins dating Tobey Cobb while trying to honor her commitment to chastity. Their growing attraction leads to a violent encounter that reveals a shocking biological condition. Desperate for answers, Dawn investigates myths surrounding her body and seeks medical help, only to encounter further exploitation. As she faces betrayal, family turmoil, and mounting fear, each new encounter teaches her more about the limits and consequences of her unusual adaptation, pushing her toward a dramatic personal transformation.