Matamoros, Mexico, 1989. After an American student goes missing, police launch an international investigation that leads them to Santeria practitioner Adolfo de Jesús Constanzo, his 24-year-old apprentice Sara Aldrete, and his cult of followers. Decades later, Sara appeals for clemency from behind bars.

After discovering over a dozen bodies and evidence of ritual sacrifice at the Santa Elena Ranch, investigators ramp up their relentless pursuit of Adolfo and his disciples. While Sara is held against her will, followers of El Padrino start to turn their back on their once infallible leader.

As she awaits word of Adolfo's fate, a recently arrested Sara submits to hours of intense interrogation. Then, over 30 years after the horrific events of 1989, Sara maintains her innocence, while police deny allegations of a far-reaching conspiracy to protect Adolfo's powerful former clientele.