Neon-drenched Seoul, 2025. Rain slicks the alleyways where shadows dance with deceit. Lee Han-wool, codenamed Mantis, a ghost from the past, emerges from retirement, his face etched with a weariness that belies his deadly grace. The underworld whispers of a power struggle brewing within the organization he once served, now led by the enigmatic Dok-go, a legend who traded blades for boardrooms. As Mantis navigates the treacherous landscape, he crosses paths with Shin Jae-yi, a sharp and ambitious trainee, her loyalty tested as she’s drawn into the escalating conflict. Benjamin Jo, a rising star with a brutal edge, sees Mantis as a threat, his ambition fueling a dangerous game of cat and mouse. Old alliances crumble as Mantis uncovers a conspiracy that threatens to shatter the delicate balance of power, forcing him to confront not only his past but also the ruthless future of contract killing.

Mantis Movie Overview
| Title | Mantis | 
|---|---|
| Release Status | Released | 
| Release Date | 2025-09-26 | 
| Runtime | 1 hours and 53 minutes | 
| Genre | Action, Crime, Thriller | 
| Original Language | Ko | 
| Spoken Language | Korean | 
| Country | South Korea | 
| Production Co. | See Át Film | 
Mantis Movie Cast
| Name | Character | 
|---|---|
| Yim Si-wan | Lee Han-wool / Mantis | 
| Park Gyu-young | Shin Jae-yi | 
| Choi Hyun-wook | Benjamin Jo | 
| Bae Gang-hee | Yang Soo-min | 
| Hwang Sung-bin | Puma Lee | 
| Yoo Su-bin | Kim Dong-yeong | 
| Jeon Bae-soo | Nam Bae-soo | 
| Jo Woo-jin | Dok-go | 
| Sul Kyung-gu | Cha Min-gyu | 
| Jeon Do-yeon | Gil Bok-soon | 
| Yang Dong-geun | Gwang-cheon / Bi-cheon | 
| Kim Joon-bae | Mr. Bae | 
| Park Kang-seop | Manager Yoo | 
| Do Yu | Secretary | 
| Ahn Seong-bong | M.K Information Desk Staff | 
| Seo Ji-oh | Leaflet | 
| Esom | Cha Min-hee (archive footage) | 
| Koo Kyo-hwan | Han Hee-sung (archive footage) | 
| Kim Seung-o | Shin (archive footage) | 
| Lee Yeon | Kim Young-ji (archive footage) | 
| Choi Byung-mo | Hyun-chul (archive footage) | 
| Kim Ki-cheon | Su-guen (archive footage) | 
| Park Kwang-jae | Gwang-man (archive footage) | 
| Jang In-sub | Yoon-sub (archive footage) | 
| Hwangbo Jung-il | Bar owner | 
| Park Seok-won | Tatto man | 
| Hwang Jin-woon | Young Han-wool | 
| Park Gyu-bin | Young Jae-yi | 
| Kim Chil-doo | Old man | 
| Shin Sung-il | Protester | 
| Ha Seon-jae | Bar friend | 
| Ryu Seong-cheol | Ssang-bong | 
| Oh Chi-woon | Cleaner | 
| Aerok Kim | Tatto Killer | 
| Jang In-seo | JB Enter. Killer | 
| Han Sang-kyung | Airport Killer | 
Mantis Movie Storyline
Lee Han-wool, once a legendary assassin known as Mantis, attempts a quiet return to the only life he knows after a self-imposed exile, haunted by the ghosts of past missions. He finds the landscape drastically changed, not only with new faces but also a rising tension within the organization now managed by the retired but formidable Dok-go. Among the new recruits is Shin Jae-yi, a promising trainee and Han-wool’s former friend, whose rapid ascent and unconventional methods both intrigue and worry him. As Han-wool grapples with adapting to the new order, a series of high-profile contract killings go awry, implicating the organization in a dangerous power struggle with a rival syndicate led by the ruthless Cha Min-gyu. Forced to investigate, Han-wool uncovers a conspiracy that reaches the highest echelons of the assassin network, revealing Dok-go’s hidden agenda and Jae-yi’s unexpected role in the unfolding events. Caught between loyalty and survival, Han-wool must confront his past and choose a side in the looming war, risking everything to protect Jae-yi and expose the truth before it consumes them all, culminating in a bloody showdown where the lines between friend and foe blur amidst betrayal and retribution.
Mantis Movie Details
In the adrenaline-fueled action thriller “Mantis,” the world of contract killers is once again disrupted when Lee Han-wool, known as Mantis (Yim Si-wan), makes a daring return after a self-imposed exile. Set against the sleek, neon-lit backdrop of South Korea’s criminal underbelly, Mantis finds the landscape irrevocably changed. The legendary Dok-go (Jo Woo-jin), now retired from active duty, runs the organization with an iron fist, shaping a new generation of assassins. As Mantis navigates this unfamiliar terrain, he crosses paths with Shin Jae-yi (Park Gyu-young), a skilled trainee and former acquaintance whose loyalty is tested by Mantis’s reappearance. A web of intrigue unfolds as Mantis uncovers a sinister conspiracy that threatens to shatter the fragile peace within the assassin world. Amidst deadly encounters and betrayals, Mantis must confront not only his past but also a rising star in the organization, the ambitious Benjamin Jo (Choi Hyun-wook), whose thirst for power ignites a fierce rivalry. Themes of redemption, legacy, and the moral complexities of violence permeate the film, forcing Mantis to question his place in a world where trust is a luxury and every kill carries a heavy price. As Mantis battles enemies old and new, with allies like Yang Soo-min (Bae Gang-hee), he is pushed to his physical and emotional limits, blurring the lines between hunter and hunted in a desperate fight for survival.
Mantis Movie Poster Images
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                Movie Trailers
Official Trailer [ENG SUB]
Official Teaser [ENG SUB]
Mantis Movie FAQs
What is the movie Mantis about?
Mantis is an action crime thriller about an ace assassin who returns to the contract killer industry after a break. He encounters his trainee friend Jae-yi and Dok-go, a retired legendary killer who now runs the organization.
What genres does Mantis fall into?
Mantis is classified as an Action, Crime, and Thriller movie.
When was Mantis released?
Mantis was released on September 26, 2025.
Who are the main actors in Mantis?
The main actors in Mantis include Yim Si-wan, Park Gyu-young and Choi Hyun-wook.
Is Mantis part of a collection?
Yes, Mantis belongs to the Kill Boksoon Collection.
Who directed Mantis?
Lee Tae-sung directed Mantis.
What is the runtime of Mantis?
The runtime of Mantis is 113 minutes.
What is the original language of Mantis?
The original language of Mantis is Korean.
Where was Mantis produced?
Mantis was produced in South Korea.
What is the tagline for Mantis?
The tagline for Mantis is A new generation of rising killers.