Beale Street, according to the narration, could stand for any black neighborhood, though in this case it appears to be Harlem.
The opening scene has the 19-year-old telling her 22-year-old boyfriend tht she is pregnant with their child. However, he is in jail without bail, accused of rape, an possibly framed by a vengeful white policeman. The story then alternates between their relationship to date, and the attempt of both black families to prove his innocence. Complicating things is that the accuser has fled "home" to Puerto Rico, which delays the trial and leaves the accused in potential permanent "temporary" detention.
I liked the story, the acting, and the "mood" of the movie. Indeed, I like it better than Moonlight, with its 3 distinctive phases and somewhat jarring transitions. I was amused at the 1st song over the closing credits - My Country Tis of Thee. Of course, Let Freedom Ring!