'Baby Holly' speaks out for the 1st time after being missing for over 40 years

Holly Miller talks about her quest for justice with David Muir.

Holly Miller was hustling to prepare a lunch order at the Oklahoma diner where she worked in June 2022, when two detectives in suits – guns and badges visible – wanted to speak with her.

The detectives delivered news that upended Miller's life: Her biological parents were murdered in 1981 in Texas, and Miller, a 42-year-old married mother of five, had apparently been missing for more than 40 years.

They said that her extended biological family was eager to meet her in a Zoom call.

Holly Miller is opening up for the first time with "20/20" co-anchor David Muir in an exclusive interview airing Friday, Nov. 3 at 9 p.m. ET and streaming on Hulu the next day.

"I was in shock," Miller told ABC News.