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.[2] In the movie, a young woman tries to escape what seems to be a family 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.

At school, Jung Eun-kyung, the top student, attempts to kill Ga-in with scissors.

Hong Seok-min, an eccentric student rumored to have killed his own father, advises Ga-in to trust no one, including herself.

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.

After Ga-in and Seok-min return home, Dae-yong commits suicide to stay away from the curse.

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.

[5] The promotion team hosted a guerilla event on August 11, 2007, where two people dressed up in school clothes with makeup that looks like blood is running down their faces scared bystanders and rewarded them with fans that had the title of the film written on it.

A bus that was wrapped with the film's promotion material also drove through the streets of Seoul on March 8, 2007.