A Bona Fide Killer: Story, Cast and Series Facts

Story and premise

Ordinary working mom Yu Bo Na is secretly the legendary assassin Kingfisher, who eliminates criminals beyond the reach of the law. Returning to work after three years of maternity leave, she resumes a perilous double life, balancing work, childcare, housework, and assassinations. As her missions grow more dangerous, a detective hunting a mysterious killer and a husband beginning to suspect the truth threaten to expose her secret. From school drop-offs to taking down criminals, every moment is a high-wire act with no room to slip up. The instant her true identity surfaces, she stands to lose everything. Can Yu Bo Na keep her identity hidden and protect both worlds as a loving wife and mother to her family and a ruthless killer to her targets?

Series details

• Title: A Bona Fide Killer
• Format: Scripted
• Language: Korean
• Genres: Drama, Action, Romance
• Premiere date: 2026-07-31
• Final broadcast date listed: 2026-09-12
• Status in TVmaze: Ended
• Network listed by TVmaze: MBC
• Network country: Korea, Republic of
• Typical episode runtime: 80 minutes
• TVMaze ID: 92867
• IMDb ID: tt43616775
• TVDB ID: 464930

Cast and credited roles

• Gong Hyo Jin — Yu Bo Na
• Jung Joon Won — Kwon Tae Seong
• Lee Sang Yi — Lee Dong Jin

Seasons in the TVmaze catalogue

• Season 1: premiered 2026-07-31; final listed air date 2026-09-12; episode order: 14.

Source and licence

Adapted from A Bona Fide Killer on TVmaze. The synopsis is reproduced as plain text; catalogue facts, cast and season records are selected and reformatted. This adapted text is available under CC BY-SA 4.0, following the TVmaze API licence. Network and web-channel credits identify the service listed in this source; they do not establish current streaming availability.