Kong Hyo Jin stars in MBC's new action thriller "A Bona Fide Killer." The K-drama's first poster has just been released.

Kong Hyo Jin plays Yu Bo Na, a manager at Sales Team 3 of Durumi Electronics. By day, she handles office work. By night, she operates in a far more dangerous capacity.

The drama follows a working mother balancing her corporate job with a secret life as a lethal operative, threading together office politics and espionage.

Kong Hyo Jin has built a reputation for complex roles across genres—from romantic comedies to intense thrillers. Casting her as a mother with a dangerous secret leverages her ability to convey both nuance and edge.

"A Bona Fide Killer" explores the tension of a woman juggling three lives simultaneously: employee, mother, and operative living in total secrecy.

The production values appear premium, with the poster suggesting sleek modern styling and an undercurrent of danger that distances the show from typical office comedy.

The series is positioned as a must-watch for viewers drawn to action thrillers with moral complexity.