The series is set in a post-apocalyptic dystopia in the distant future where a tribe believes that two of its children have the mythical power to see. The series premiered on November 1, 2019, and was renewed for a second season, but filming was temporarily delayed due to the COVID-19 pandemic. In June 2021, Apple announced the show was to be renewed for a third season. It was announced as the show's last and is set to premiere on August 26, 2022.
In the twenty-first century, a virus wiped out most of humanity and their descendants have all lost their sense of sight. The concept of vision has become a myth, and any mention of it is considered heresy.