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Mantis is a 2025 Korean action film on Netflix about three elite contract killers competing for power in a hired-killer industry whose old rules have fallen apart. It premiered exclusively on Netflix on September 26, 2025, and is a spin-off set in the same universe as Kill Boksoon.
What is Mantis about?
Han-ul, known as Mantis, returns to the contract-killer business after a long hiatus and finds its organization in disarray. He crosses paths with Jae-yi, his former fellow trainee and rival, and Dok-go, a retired, legendary killer who once mentored him. Netflix’s announcement says Han-ul and Jae-yi start a new company as mistrust and rivalries complicate their partnership, while Dok-go returns to stake a claim in the organization.
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The story centers on competing ambitions and shifting loyalties in a destabilized underworld. Netflix’s official title page describes the film as a movie; the premise and release details come from Netflix’s September 14, 2025 announcement.
Is Mantis connected to Kill Boksoon?
Yes. Netflix identifies Mantis as a spin-off set in the same hired-killer universe as its 2023 film Kill Boksoon. The films focus on different characters: Mantis follows Han-ul, Jae-yi, and Dok-go, while Kill Boksoon centers on Gil Boksoon. The available official descriptions establish a shared universe, not a direct sequel.
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There is also creative continuity: Byun Sung-hyun, who directed Kill Boksoon, co-wrote Mantis with its director, Lee Tae-sung. Netflix announced the production and spin-off relationship on September 1, 2024.
Who is in the cast of Mantis?
| Actor | Role or credit |
|---|---|
| Yim Si-wan | Han-ul / Mantis |
| Park Gyu-young | Jae-yi |
| Jo Woo-jin | Dok-go |
| Jeon Bae-soo | Additional cast |
| Bae Gang-hee | Additional cast |
| Hwang Seong-bin | Additional cast |
| Yu Su-bin | Additional cast |
| Choi Hyun-wook | Additional cast |
| Kim Jun-bae | Additional cast |
| Park Kang-sup | Additional cast |
Lee Tae-sung directed the film, marking his feature-directing debut. Netflix’s production announcement credits him and Byun Sung-hyun as co-writers and names SEE AT Film Co., LTD as producer.
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Where can you watch Mantis?
Mantis premiered exclusively on Netflix on September 26, 2025. Its Netflix title page lists watch and offline-download features. The page’s rating, Korean original audio, dubbed audio, and subtitle options may vary by country and catalog, so check the listing available in your region for current details.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
