What happens when an elite assassin returns to a world without rules? Old bonds break, allies become rivals, and a new deadly game begins. If you love thrilling Korean films, whether you prefer tense stories or sharp action, keep reading to find out when the Netflix Korean movie “Mantis” will premiere and why it should be on your 2025 watchlist.
“Mantis” (사마귀) – Korean Movie 2025
Get ready for a ride. Also known as “Praying Mantis,” the new 2025 Korean film “Mantis” on Netflix explores loyalty, betrayal, and survival in a world without rules.
The movie expands the slick, dangerous universe of Netflix’s 2023 hit film “Kill Boksoon.” This spin-off promises intense action, twisted loyalties, and a story about survival when the old world dies.
A Story of Survival and Betrayal
The film centers on Han-ul. He is an ace killer known as Mantis. After taking a long break, he returns to find his world in utter chaos.
The secret organization he served is falling apart. The old rules that once kept order no longer matter. Mantis must now fight to survive in this ruthless new world. He faces new enemies and old friends who have become his deadliest rivals.
Meet “Mantis” Cast
In the new film, you’ll see some exceptional talent on screen.
The brilliant Yim Si-wan plays our hero, Mantis. You might know him from “Unlocked,” and he brings a quiet intensity to this role.
Park Gyu-young of “Sweet Home” stars as Jae-yi. She was once Mantis’s trainee and friend. Now, she is a powerful assassin in her own right. Their shared history makes their conflict deeply personal and dangerous.
Veteran actor Jo Woo-jin of “Gangnam B-Side” plays Dok-go. He is the retired legend who founded the organization. Seeing his empire crumble, he steps back into the shadows to reclaim control.
Furthermore, veteran actors Sul Kyung-gu and Jeon Do-yeon, who previously starred in “Kill Boksoon,” will appear in this movie in supporting roles. Sul Kyung Gu plays the role of Cha Min-gyu, and Jeon Do-yeon plays the role of Kill Boksoon.
Other supporting actors who will add tension in this film are:
- Choi Hyun-wook as Benjamin, CEO of Meta Software.
- Bae Gang-hee as Sumin.
- Hwang Sung-bin as Puma Lee.
- Yoo Soo-bin as Dong-yeong.
This movie will also feature guest stars such as Jeon Bae-soo, known for his role as a father in “Extraordinary Attorney Woo,” and Kim Tae-han, of “When the Phone Rings.”
Why You Can’t Miss This Korean Film
So, why should you be excited for this 2025 Korean film?
First, it’s a spin-off of “Kill Boksoon.” If you loved that movie’s style and action, “Mantis” will deliver. It expands that incredible, deadly universe you already know.
The action will be top-tier. But the story is about more than just fights. It’s a compelling drama about loyalty and betrayal. The film explores what happens when trust is completely broken in a world where it’s the only thing that can keep you alive.
The creative team is fantastic. Byun Sung-hyun, the director of “Kill Boksoon,” co-wrote the script. This ensures the film will have the same sharp storytelling and stylish feel.
Following Netflix’s hit series “Squid Game” 2 and 3, you will watch Yim Si-wan and Park Gyu-young co-starring in a deadly fight in this movie.
Additionally, three out of four young actors will make their film debut with this film. They are Choi Hyun-wook (“Weak Hero Class 1”), Bae Gang-hee (“The Glory”), and Hwang Sung-bin (“The Winning Try”).
“Mantis” Premiere Date & Where to Watch
“Mantis” brings a tight plot and bold action. It builds on a known world. It adds new faces and hard choices. If you love watching high-octane action Korean films, be sure to add this to your list.
Mark your calendars! The new Korean movie, “Mantis,” with a runtime of 1 hour 53 minutes, will exclusively premiere on Netflix on September 26, 2025. The film will be available worldwide on that date, so be sure to get your popcorn ready!
With a crumbling empire and enemies on all sides, Mantis faces his deadliest challenge yet. The old rules are gone, and new predators are emerging. When everyone is a threat, who can you trust?
Watch the trailer for “Mantis” below.
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