A week after airing its adaptation of Catherine Oxenberg’s NXIVM memoir, “Captive: A Mother's Crusade to Save Her Daughter from a Terrifying Cult,” Lifetime’s back with an all-new movie based on a true story.

“Trapped: The Alex Cooper Story,” based on Alex Cooper’s memoir, “Saving Alex,” which was written with Joanna Brooks, centers on a teenage Alex (Addison Holley, “Annedroids”) and what happened after she told her Mormon parents she’s gay.

According to the Lifetime movie synopsis, “when 15-year-old Alex revealed she was gay to her devout Mormon parents, they feared so deeply for her soul that they took her from their Southern California home and placed her against her will in a conversion therapy home in Utah.

lifetime alex cooper movie synopsis
Addison Holley stars as Alex Cooper in Lifetime’s feature “Trapped: The Alex Cooper Story.” Lifetime / Amanda Matlovich

“Trapped for eight months with strangers (Sarah Booth as Tiana and Ian Lake as Johnny), Alex faced horrible punishments and beatings that were intended to cure her homosexuality. After realizing she would have to submit to their rules in order to survive, Alex was eventually allowed to attend school, where she became friends with a boy that was the president of the gay-straight alliance.”

In the end, Alex’s new friend helped her get in touch with an attorney (Wilson Cruz), who later helped her escape.

Directed by Jeffrey G. Hunt and written by Michelle Paradise, the cast also includes Steve Cumyn (Mr. Cooper), Kate Drummond (Mrs. Cooper), Marie Dame (Sister Young), Pip Dwyer (Sandra), Alexander Elliot (Spencer), Humberly González (Hannah), Emma Victoria Jackman (Emma), Stephen Joffe (Jason), Natalie Liconti (Colette), Laurie Murdoch (Bishop Carver), Elisa Moolecherry (Carol) and Nicolette Pearse (Frankie).

“Trapped: The Alex Cooper Story” premieres on Lifetime on Saturday at 8 p.m. EDT.