Netflix is teasing Mantis, a spinoff movie of the action crime thriller film Kill Boksoon.
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The preview released Wednesday names the rules for assassins who wish to rank first among their fellow killers.
"First, you must not kill minors," a voice says in the 55-second teaser. "Second, you will only take on offers sanctioned by your company. Third, you must always attempt offers sanctioned by your company."
The film follows Han-ul (Yim Si-wan), better known as Mantis, who is back from vacation and ready to beat out the other assassins.
"The secret society of contract killers falls into chaos, unleashing a new breed of assassins. With old rules in ruins, who dares claim the shadows?" a logline reads.
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The film also stars Park Gyu-young and Jo Woo-jin, and arrives on the streamer Sept. 26.