ABC News Live Prime with Linsey Davis

Mark Vicente and Sarah Edmondson, high-ranking former NXIVM leaders, describe the dream and mission of NXIVM to build a better world. Bonnie Piesse, Mark's wife, tells him she's worried about the organization and Keith Raniere, NXIVM's leader and Mark's mentor. Mark wonders how could tools to make a better, more ethical world be misused?

Bonnie leaves NXIVM to make sense of it all and tries to convince Mark that something's amiss.

Sarah confides in Mark about DOS, a secret women's group involving "masters" and "slaves." She struggles in her relationships with NXIVM, her husband, Nippy, and her best friend. Nippy confronts the organization he's helped grow for 15 years. Sarah and Mark lament how many members they've recruited and question what to do next.

Mark, Bonnie, Sarah and Nippy strategize with Catherine Oxenberg about how to get her daughter, India, out of DOS, even though she wants to stay. "Jane," a former member and India's close friend, describes the appeal of the organization -- and why she left it all behind.

The team approaches the New York Times in order to get the attention of the authorities. Mark reflects on his role supporting NXIVM.

When they see no action by the authorities, Sarah, Mark and Nippy contact additional news outlets to provoke outrage and pressure law enforcement to pay attention. Barbara Bouchey, a former board member and early defector, shares her insight into NXIVM and reflects on her time in Keith’s inner circle.

After learning that the New York Attorney General's chief investigator is interested in building a criminal case against Keith, Catherine travels to Buffalo to meet with Frank Parlato, creator of the anti-NXIVM blog "The Frank Report," to build a dossier of evidence. Meanwhile, we're introduced to Toni Natalie, one of Keith's former girlfriends.

As the group prepares to testify to the FBI, they reflect on their beliefs regarding the SOP and JNESS curriculums.

Keith hasn't been seen in Clifton Park for weeks, and the team gets a tip on where he might be. Catherine meets with India, who maintains her position. Mark and Bonnie return to Clifton Park for the first time since leaving NXIVM and confront their memories of Keith and the curriculum. Sarah, Bonnie, Mark, Nippy and Catherine face a shocking development in the case.