MBC’s Friday-Saturday drama A Bona Fide Killer has passed a nationwide viewership rating of 10 percent after six episodes and is leading its time slot. The series stars Gong Hyo-jin as Yoo Bo-na, a working mom and contract killer who returns to work after parental leave while hiding her identity. Critics have praised its mix of revenge, family drama, and workplace struggle, while others question its vigilante premise and moral message.

Yoo Bo-na (Gong Hyo-jin), a contract killer who has returned from three years of parental leave, aims a gun in MBC’s Friday-Saturday drama “A Bona Fide Killer.” Courtesy of MBC

The void left by So Ji-sub's secret agent dad in "Agent Kim Reactivated" has been filled by “killer mom” Gong Hyo-jin, as MBC’s Friday-Saturday drama “A Bona Fide Killer” surpassed a nationwide viewership rating of 10 percent after just six episodes, taking first place in its time slot.

Playing a contract killer named “Kingfisher,” Gong's character returns to work as an assassin to target vicious criminals let off with light sentences.

Unbeknownst to everyone, “Kingfisher” is actually Yoo Bo-na, a working mom with a 4-year-old daughter. She works on a sales team at Durumi Electronics, which is the front for an organized group of killers specializing in poisoning, stabbing and sniping.