Passing through the backwoods town of Sparta, Mississippi, Philadelphia detective Virgil Tibbs (Sidney Poitier) becomes embroiled in a murder case. He forms an uneasy alliance with the bigoted police chief (Rod Steiger), who faces mounting pressure from Sparta’s hostile citizens to catch the killer and run the African American interloper out of town. Director Norman Jewison splices incisive social commentary into this thrilling police procedural with the help of Haskell Wexler’s vivid cinematography, Quincy Jones’s eclectic score, and two indelible lead performances.