About the title
Kyung-mi, a deaf girl, works as a sign-language consultant at a call center. One night she witnesses a murder and immediately becomes the next target of a serial killer. What follows turns into a silent chase. Kyung-mi's deaf mother must also do everything she can to protect her daughter. The film was released simultaneously in theaters and on the TVING streaming service on June 30, 2021. It had originally been scheduled for release in 2020, but was delayed due to a resurgence of the COVID-19 pandemic.