Zachary Quinto narrates this challenging documentary about an unlikely 50-year friendship

Narrated by Zachary Quinto, the riveting new documentary Conversion takes a look at the history of gay conversion therapy and two men who bravely stood up against it.

The film tells the story of how these two unlikely friends — straight psychologist Gerald Davison and gay activist Charles Silverstein — changed the psychology world for the better after first crossing paths 50 years ago at a Behavioral Therapies Convention in New York City.

While Davison had been deeply involved in a practice dubbed “Playboy Therapy,” wherein he would attempt to teach gay men how to be straight, his first meeting with Silverstein proved eye-opening.

After what Davison dubs “an intellectual and emotional epiphany,” the men started speaking out against such practices, still quite common at the time, leading to an eventful moment when Davison presented his case at a national convention to over 1,000 peers.

This new film celebrates their courage and activism while also examining their moving 50-year friendship.

Watch the trailer for Conversion below. The film is available now on Dekkoo.