NXIVM Cult President Nancy Salzman Gets Candid in "The Vow" Season 2 Official Trailer

HBO's "The Vow" is returning for a second season, and the official trailer, which dropped on Sept. 22, shows that it will pick up where the first season left off: Diving into the NXIVM cult's downfall after the exposure of its sordid inner workings.

The streamer first confirmed that a second installment was coming in October 2020, after filmmaker Jehane Noujain teased the possibility to Variety, saying, "We reached out to everybody involved — many people, on all sides of the story — and we are continuing to film."

The second season will be titled "The Vow Part Two" and will center on NXIVM founder Keith Raniere's federal trial. Raniere was arrested back in March 2018 on several charges, including racketeering, sex trafficking, and forced labor conspiracy. In June 2019, he was convicted, and was sentenced to 120 years in prison in 2020. Several other members associated with NXIVM — including Allison Mack, cofounder and president Nancy Salzman, and financial backer Clare Bronfman — have also been indicted. Mack pled guilty to racketeering charges in April 2019 and was sentenced to three years in prison in 2021, while Salzman received three and a half years and Bronfman got six years and nine months.

The second installment will also feature the return of season one whistleblowers like Bonnie Piesse, who told POPSUGAR in June that while she is a "private person," she felt that it was necessary to tell her story. "We really wanted people to understand more how this happens and that it's everywhere," she said. "And we had a very strong drive to stop Keith Raniere from what he was doing, and that just seemed like one big way to try to do that."

Ahead, check out what we know about the show's plot, trailer, and release date.

According to HBO, part two of "The Vow" will follow the "legal and emotional journeys of the group's founders, supporters and defectors," and it promises to uncover "new evidence and stunning revelations." It will follow Raniere's federal trial, and will focus on NXIVM's inner circle, including Salzman, exploring the fallout of the group's collapse.

"The Vow" Part Two will premiere on HBO on Oct. 17.