Cello is a 2005 South Korean horror film.

Plot

Part-time professor and former cellist Mi-ju (Sung Hyun-ah) is invited to a homecoming concert by a talented student Kim Hae-young, sister of Tae-yeon, whom Mi-ju knows. On her way out, a former student accosts Mi-ju for giving her bad grades and promises revenge. Driving hime, Mi-ju plays an unmarked cassette tape in her car, and hears a cello tune. She suddenly has a headache and loses control of her car, driving straight into a truck. She jolts awake from the apparent nightmare and takes out the tape.