12 Years a slave is written by John Ridley and directed by Steve McQueen. It tells the true story of Solomon Northup, an African-American freeman who, in 1841, was snatched off the streets of Washington, and sold. It’s at once a familiar, utterly strange and deeply American story in which the period trappings long beloved by Hollywood — the paternalistic gentry with their pretty plantations, their genteel manners and all the fiddle-dee-dee rest — are the backdrop for an outrage.