Mary Kahn was an everyday parishioner who ascended to the Church of Scientology's highest levels of spiritual enlightenment. But as she shares with Leah, the price tag of her experience was extreme – eventually including the relationship with her youngest son.

David Miscavige emerges as the leader of the Church of Scientology following the death of founder L. Ron Hubbard; three former longtime church members, including Miscavige's father, share their stories.