(From left to right) Park Gyu-young, Yim Si-wan and Jo Woo-jin. Photo courtesy of NetflixSouth Korean actor Yim Si-wan will lead the cast of a spin-off to the crime action film "Kill Boksoon," Netflix said Monday.

The streaming giant confirmed the production of the film with the working title "Mantis," which also stars Park Gyu-young and Jo Woo-jin.

The spin-off focuses on Han-ul (Si-wan), an ace assassin known as Mantis, who was mentioned in "Kill Boksoon" as having "gone on a vacation." In the new film, he returns to the hired killer industry "in search of new opportunities," Netflix said.

Upon reentering the anarchic industry, Mantis crosses paths with Jae-yi (Gyu-young), his fellow trainee and rival, and Dok-go (Woo-jin), a retired legendary assassin.

"Kill Boksoon," which premiered on Netflix in 2023, stars Jeon Do-yeon as the titular character, a single mother who balances her role as a highly skilled assassin with her responsibilities at home.

Si-wan initially debuted as a member of the K-pop boy band ZE:A before venturing into acting. His notable projects include the sports drama "Run On," romance series "Summer Strike," and the thriller film "Unlocked."

Gyu-young is known for her roles in shows like "It's Okay to Not Be Okay," "Sweet Home," and "Celebrity," while Woo-jin has appeared in series such as "Happiness" and "Narco-Saints."

Both Si-wan and Gyu-young are also set to star in the second season of Netflix's survival drama series "Squid Game," scheduled to premiere on December 26.

READ: 'Squid Game' returns December 26, to conclude with 3rd season

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