On the Line (2021)
A South Korean action crime thriller about one man's dangerous mission to dismantle the voice phishing network that destroyed his life.
On the Line - Movie Information
- Original Title: 보이스
- Release Year: 2021
- Directed by: Kim Gok, Kim Sun
- Type: Movie
- Genres: Action, Crime, Drama
- Runtime: 1h 49m
- Original Language: Korean
- Spoken Languages: Korean
- Release Date (Theatrical): September 15, 2021 (South Korea - 15)
- Alternative Titles: Voice (CN), Boiseu (KR), 拦截声命线 (TW), Estafa telefónica (MX), 声 姿なき犯罪者 (JP)
- Production Companies: Soo Film
- Production Countries: South Korea
On the Line - Plot
Seo-joon, loses everything to voice phishing and infiltrates a organization in China to meet Kwak Pro, the designer behind this phishing system.
On the Line - Trailer
Watch the official trailer and see the tension unfold:
Infiltrate the phishing network.
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On the Line - Cast & Crew
Director(s)
- Kim Gok
- Kim Sun
Main Cast
- Byun Yo-han
- Kim Moo-yul
- Kim Hie-won
- Park Myung-hoon
- Lee Zoo-young
- Jo Jae-yun
- Lee Kyu-sung
- Won Jin-ah
- Lee Woon-san
- Ok Ja-yeon
Writers
- Bae Young-ik
Producers
- Park Ja-myung
On the Line - FAQs
What is On the Line about?
On the Line follows Seo-joon, a man who loses everything to a voice phishing scam and decides to fight back. He goes undercover inside the criminal organization operating from China, determined to reach Kwak Pro, the mastermind who engineered the entire fraud network. It's a tense, revenge-driven thriller.
Is On the Line based on a true story?
On the Line is not based on a single true story, but it draws heavily from the very real and widespread problem of voice phishing scams in South Korea. These fraud operations, often run from overseas call centers, have devastated thousands of Korean families, lending the film a grounded, urgent authenticity.
Who are the main actors in On the Line?
Byun Yo-han leads the cast as Seo-joon, the revenge-driven protagonist, opposite Kim Moo-yul as the cunning Kwak Pro. The ensemble also features Park Myung-hoon, Kim Hie-won, Lee Zoo-young, Jo Jae-yun, Won Jin-ah, and Ok Ja-yeon, all delivering sharp, committed performances.
Does On the Line have a satisfying ending?
On the Line builds to a confrontation between Seo-joon and Kwak Pro that pays off the film's slow-burn tension. Without spoiling too much, the ending delivers on the revenge thriller promise, though it leans into moral complexity rather than a clean, triumphant resolution — which makes it all the more memorable.
Who directed On the Line?
On the Line was co-directed by the filmmaking duo Kim Gok and Kim Sun, who are known for their sharp, socially engaged Korean crime films. Their collaborative approach brings a layered, kinetic energy to the film's undercover thriller premise.
Is On the Line worth watching for crime thriller fans?
Absolutely. On the Line delivers exactly what fans of Korean crime cinema love — a gripping cat-and-mouse setup, strong performances, and a socially relevant premise rooted in real-world fraud. Byun Yo-han is compelling throughout, and the film maintains tension from start to finish.
What are some movies similar to On the Line?
If you enjoyed On the Line, check out The Chaser (2008) for another intense Korean crime thriller, or Master (2016) for a slick fraud-investigation story. Believer 2 (2023) and Jo Pil-ho: The Dawning Rage (2019) are also strong picks in the same vein of gritty Korean action crime.
Where was On the Line filmed?
On the Line was produced in South Korea by Soo Film, though the story spans locations in both South Korea and China, reflecting the cross-border nature of the voice phishing operations it depicts. The film captures the claustrophobic, industrial atmosphere of underground criminal call centers convincingly.
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