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Holly Madison, shown here Nov. 29, 2015, in Hollywood, California, met Hefner in 2001. Getty Images

KEY POINTS

  • Holly Madison talked about the mystique surrounding the Playboy brand in a new docuseries
  • Madison serves as executive producer for ID's "The Playboy Murders," which will premiere next month
  • The new series will investigate the deaths, murders and scandals linked to the Playboy brand

Holly Madison recounted the dark side of being a Playmate in a new haunting series titled "The Playboy Murders."

Investigation Discovery (ID) just dropped the first trailer for its upcoming series about the Playmates. In the teaser, Madison talked about the things that most were unaware of when they were in the Playboy mansion.

"There was something about the Playboy brand that had a little bit more of a mystique to it," Madison, 42, who served as executive producer of the show, said.

The "Down the Rabbit Hole" author, who dated Playboy founder Hugh Hefner from 2001 to 2008, was only one of the girls who enjoyed the perks of being a Playmate.

"It was a fantasy land," one woman says in the trailer, while another adds, "We were like rock stars."

However, being part of the Playboy world didn't come without costs. The clip teases the deaths, murders and scandals linked to the brand since it was founded in 1953.

"I remember her saying that all that glitter isn't gold," a woman can be heard saying in the clip as the trailer shows someone holding a glass of wine. "Not everybody is who they say they are," a voiceover from a man adds.

"A life of glamour ... A world full of secrets ... A descent into darkness," the trailer teases.

It also included clips of a report about someone being dead. According to Us Weekly, one of the tragedies the series will explore is the 2009 murder of Jasmine Fiore, who was found dead and dismembered in a dumpster after a Playboy party.

When the model's corpse was discovered, her teeth and fingers were missing. They were only able to find her by tracking down the serial number of her breast implants.

She was murdered by Ryan Jenkins, her husband of five months. He appeared on former Playboy model Megan Hauserman's "Megan Wants a Millionaire" reality series on VH1, Entertainment Weekly reported.

"These horrible things could really happen to anyone," Madison says in the video. "These were real people with real families."

She adds, "When you pose nude a lot of people think it grants some sort of ownership to you."

Madison has been sharing her experience at the Playboy mansion with Hefner. In the A&E docuseries "Secrets of Playboy," she mentioned the "cult-like" atmosphere in the mansion.

"The reason I think the Mansion was very cult-like, looking back on it, is because we were all kind of gaslit and expected to think of Hef as, like, this really good guy," she said. "And you started to feel like, 'Oh, he's not what they say in the media — he's just a nice man."

She added that it felt like a cult because they were isolated from the outside world and had a 9 o'clock curfew. They were encouraged not to have friends and were not allowed to leave unless it was a family holiday.

"The Playboy Murders" premieres on ID at 10 p.m. on Jan. 23.

Hugh Hefner and Holly Madison
Holly Madison claimed on her memoir that she saw Hugh Hefner's last will and testament. Pictured: Hefner and Madison pose during a press conference introducing the new season of Hefner's TV show "Girls of the Playboy Mansion" on E! Entertainment on Jan. 11, 2007 at the Palyboy Mansion in Beverly Hills, California. Getty Images/Gabriel Bouys