After years of speculation that an explosive Duggar documentary was in the works, there’s finally a trailer for it. The producers of the hit docuseries “LuLaRich” have also produced the Duggar docuseries, “Shiny Happy People: Duggar Family Secrets,” which will premiere on Prime Video next month.

Jill Duggar, now Dillard, also appears in the docuseries along with her husband, Derick Dillard, and her cousin Amy Duggar King.

The series explores what’s really underneath the seemingly wholesome family’s troubling ties to a radical religious organization known as the Institute in Basic Life Principles (IBLP), formerly run by disgraced pastor Bill Gothard. The series also explores how the organization has shaped—and negatively impacted—the once-popular TLC reality star family and the multiple scandals the family has faced in recent years.

“The IBLP teachings aren’t Christianity,” one woman states in the trailer. “They’re something entirely different.”

“There’s a story that’s going to be told,” Jill says. “And I would rather be the one telling it.”

Reflecting on how she was raised, Jill says of her family: “We were part of IBLP as early as I can remember.”

Another man alleges that IBLP founder Bill Gothard “turned every father into a cult leader and every home into an island.”

Another woman alleges that “the institute raises little predators.” The trailer then cuts to a clip of Josh Duggar’s arrest for possession of child sexual abuse material.

Jill may have been the first Duggar to “break free” in a sense, but she’s not the only member of her family who has spoken openly about the harm IBLP caused the Duggar siblings. Jinger, one of Jill’s younger sisters, gave an interview to PEOPLE earlier this year while promoting a book.

“Fear was a huge part of my childhood,” she said back in January. “I thought I had to wear only skirts and dresses to please God. Music with drums, places I went or the wrong friendships could all bring harm.”

Of Gothard, Jinger confirms his teachings created a very insular environment.

“His teachings were so harmful, and I’m seeing more of the effects of that in the lives of my friends and people who grew up in that community with me,” she says. “There are a lot of cult-like tendencies.”