Bo-na, Tae-sung, and their four-year-old daughter Yul are a typical happy and harmonious family. After a three-year parental leave, Bo-na returns to work and successfully completes her duties from day one, defying concerns. Meanwhile, Tae-sung, covering a drug case, learns a serial killer who disappeared four years ago has returned.
","_links":{"self":{"href":"https://api.tvmaze.com/episodes/3658838"},"show":{"href":"https://api.tvmaze.com/shows/92867","name":"A Bona Fide Killer"}},"_embedded":{"show":{"id":92867,"url":"https://www.tvmaze.com/shows/92867/a-bona-fide-killer","name":"A Bona Fide Killer","type":"Scripted","language":"Korean","genres":["Drama","Action","Romance"],"status":"Ended","runtime":80,"averageRuntime":80,"premiered":"2026-07-31","ended":"2026-09-12","officialSite":"https://program.imbc.com/ABonafideKiller","schedule":{"time":"21:50","days":["Friday","Saturday"]},"rating":{"average":null},"weight":90,"network":{"id":166,"name":"MBC","country":{"name":"Korea, Republic of","code":"KR","timezone":"Asia/Seoul"},"officialSite":null},"webChannel":null,"dvdCountry":null,"externals":{"tvrage":null,"thetvdb":464930,"imdb":"tt43616775"},"image":{"medium":"https://static.tvmaze.com/uploads/images/medium_portrait/641/1604074.jpg","original":"https://static.tvmaze.com/uploads/images/original_untouched/641/1604074.jpg"},"summary":"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?