Cello (film)

Cello Korean is a 2005 South Korean horror film.

Another scene shift shows Hong Miju Sung Hyunah watching students playing their cellos while their professor grades them. The professor tried to coax her into going to a welcome home concert for the little sister of Kim Taeyeon. Miju declines both the concert and a job offer to become more than just an associate teacher. In the teachers lounge, Miju is confronted by a student who tells Miju that all because of Miju, all of her work for music is for nothing. The student is smug and cocky, promising revenge. Miju leaves, shaken, and starts to drive home. On her way back home, she nearly avoids getting into an accident with a truck. When she gets home, Miju receives a message on her cell phone Are you happy? ...You should be.Startled, Miju looks around the house while turning on lights, but they snap off when she reaches the attic. There, she sees her elder, autistic daughter, Yoonjin Choi Jieun. The lights come on, revealing her husband Junki Jeong Hobin, her sisterinlaw Kyeongran Wang Bitna, and her younger daughter Yoonhye. Everyone but Yoonjin, who appears mute and emotionless, sings Happy Birthday to Miju. Miju opens her presents. Later on, as they bathe, Miju tells Yoonjin how happy she is, how much she loves Yoonjin. Miju seems to share a special affection for Yoonjin. ........

Source: Wikipedia