It’s San Francisco in 1957, and an American masterpiece is put on trial. And “Howl,” the film, recounts this dark moment using three interwoven threads: the tumultuous life events that led a young Allen Ginsberg (James Franco) to find his true voice as an artist, society’s reaction (the obscenity trial), and mind-expanding animation that echoes the startling originality of the poem itself. All three coalesce in a genre-bending hybrid that brilliantly captures a pivotal moment-the birth of a counterculture.