GenreCrime, Drama, Horror Music directorKim Jun-seok CountrySouth Korea
Release date22 August 2007 (2007-08-22) Based onIts Two People
by Kang Kyung-ok WriterKyung-ok Kang (comic book), Hyo-Chul Lee (adaptation), Ki-hwan Oh (screenplay), Lee Shin-ae (adaptation) Initial releaseAugust 22, 2007 (South Korea) CastYoon Jin-Seo (Ga-in Kim), Park Ki-Woong (Hong Seok-min), Yu-seon Ham (Sang-kyung), Kim So-eun (Ga-yun Kim), Lee Ki-Woo (Hyung-Joong) Similar moviesCarrie, The Fault in Our Stars, The Boy Next Door, Paper Towns, A Nightmare on Elm Street Part 2: Freddy's Revenge, The Loved Ones
Someone Behind You is a 2007 South Korean psychological horror film written, directed and co-produced by Oh Ki-hwan, based on the manhwa It's Two People by Kang Kyung-ok. In this movie, a young woman tries to escape what seems to be a curse that is killing members of her family one by one.
It was released in America at the 2009 After Dark Horrorfest film festival with the title Voices.
Kim Ga-in is a student in South Korea. She and her family come to her aunt Jee-sun's wedding but before the wedding, Jee-sun is pushed off the balcony and rushed to the hospital. Ga-in waits with her boyfriend, Park Hyun-joong, while her aunt recovers. They then witness Jee-sun's younger sister, Jung-sun, repeatedly stabbing her.
Jung-sun is arrested for Jee-sun's murder, and held for questioning. It is revealed that the family believes they are cursed and at least one member dies in incomprehensible ways. In this case, Jung-sun was possessed and killed Jee-sun. At school, Jung Eun-kyung, the top student, attempts to kill Ga-in with scissors. During the struggle, Eun-kyung is stabbed instead and transfers to another school. That same day, Ga-in is confronted by her teacher, who blames her for Eun-kyung leaving and tries to kill her. Ga-in is saved by a classmate.
Hong Seok-min, an eccentric student rumored to have killed his own father, advises Ga-in to trust no one, including herself. She visits Jung-sun to ask her about the murder. She tells her that Jee-sun's husband is Jung-sun's ex-boyfriend, and she had required revenge on Jee-sun. She says that an unknown force possessed her and coerced her to kill. That evening, the classmate that had saved her comes to have his try at killing her. She runs inside only to find her mother throwing knives at her. Frightened and no longer feeling safe inside her own home, Ga-in tells her father she is leaving. Her father tells her that there is a forgotten family member in a different village, named Hwang Dae-yong. On the bus, Ga-in meets Seok-min again, and together they visit Dae-yong.
Dae-yong tells them how he killed his wife in a fit of jealousy when he learned of his wife's alleged affair, then tried to find the force that controlled him after being released from jail. After Ga-in and Seok-min return home, Dae-yong commits suicide to stay away from the curse. At school, Ga-in has an apparition of her best friend killing her and realizes that she really cannot trust anyone. One night she wakes up and finds her parents killed. It is divulged that Hyun-joong is the one who killed her parents. Hyun-joong stabs her as she tries to save her younger sister Ga-yeon, and wants to set the house on fire to turn it into hell. Both sisters stab him and leave him dead as the house begins to burn.
In the hospital, Ga-in and Ga-yeon are placed in the same room. Ga-in is having nightmares and is woken by her sister. Ga-in has a hallucination of Ga-yeon taking a knife from her pocket; they struggle and the knife ends up stabbing Ga-yeon. Ga-yeon cries and asks Ga-in how she could do this to her own sister. Seok-min appears and exposes his true individuality: the curse. He can only be seen by Ga-in and the people he controls. Ga-in looks down at Ga-yeon and realizes that it wasn't a knife in her pocket, but instead a burnt family photo. Seok-min then tries to kill Ga-in. Ga-in stabs Seok-min, but in reality she stabs herself because he is controlling her from the inside.
In the epilogue, a boy is being verbally assaulted by his teacher. After the teacher leaves, Hong Seok-min appears in a new body and asks the boy if he wants help to get back at the teacher.
Yoon Jin-seo as Kim Ga-in
Park Ki-woong as Hong Seok-min
Lee Ki-woo as Park Hyun-joong
Kang Yi-seok as young Hyun-joong
Kim So-eun as Kim Ga-yeon
Lee Kan-hee as Ga-in's mother
Jeong Yu-mi as Lee Myung-hee
Ahn Nae-sang as Ga-in's homeroom teacher
Oh Yeon-seo as Jung Eun-kyung
Jo Seon-ju as Kim Jee-sun
Seo Yoo-jung as Kim Jung-sun
Jeon Guk-hwan as Jee-sun's father
Kim Min-kyung as Jee-sun's mother
Ahn Shin-woo as Hong Jae-sun
Kim Seong-jun as Hwang Dae-yong
Park Seung-tae as Dae-yong's mother
Seo Yoon-jae as Kim In-sook
Jung Wook as Hyun-joong's father
Baek Joo-hee as Hyun-joong's mother
Jung In-gi as Detective Jo
Kim Do-yeon as Kim Mi-joo
Ham Yu-seon as Lee So-ri
Lee Geung-young as Ga-in's father
Yeon Je-wook as Choi Sang-kyung
The film currently holds a 43% "rotten" rating on Rotten Tomatoes' audience review section. Dread Central reviewed the movie, writing "These Voices need to shut up. Do not bother. You've been warned."