A promising political career faces immense turmoil when a car accident occurs on Chappaquiddick Island. Senator Ted Kennedy, who is driving, accidentally drives off a bridge into a pond, resulting in the tragic drowning of his passenger, campaign strategist Mary Jo Kopechne. Ted manages to escape the sinking vehicle but mysteriously delays reporting the incident for several hours, raising numerous questions about his actions and motives in the immediate aftermath.

As the incident garners widespread media attention, Ted must navigate the ensuing political and personal fallout. He contends with intense scrutiny from law enforcement and public opinion, while also dealing with the pressures and expectations of his powerful family. The incident forces a reevaluation of his political future and prompts deep reflection on his character and legacy. The narrative explores themes of power, privilege, and responsibility as the repercussions of the event ripple through his life and career.