Rustin follows Bayard Rustin, a powerful freedom fighter who spent his life fighting for civil rights through non-violence, a lesson he helped pass on to Martin Luther King Jr. The movie follows his journey to organize the 1963 March on Washington, which changed the course of the Civil Rights movement. The movie also examines the challenges he faced, including not only racism but also homophobia.
https://screenrant.com/rustin-movie-director-george-c-wolfe-interview/