# A Bona Fide Killer Episode 13: Kong Hyo Jin’s Hidden Russian Past Finally Comes to Light as a Dangerous Copycat Threatens Everything

URL: https://technosports.co.in/a-bona-fide-killer-episode-13-kong-hyo-jins/  
Published: 2026-09-11  
Updated: 2026-09-11  
Author: Reetam Bodhak

Just when fans thought they had “A Bona Fide Killer” figured out, the show is about to blow the lid off its biggest mystery yet. Episode 13 promises to unveil Yu Bo Na’s shadowy past in Russia — and it couldn’t come at a more dangerous moment for the secret sniper known as Kingfisher.

### The Premise That’s Hooking Everyone

Based on a popular webtoon, “A Bona Fide Killer” follows Yu Bo Na (Kong Hyo Jin), an unassuming sales manager at Durumi Electronics who secretly moonlights as the legendary assassin Kingfisher. It’s a clever premise — juggling office politics and lethal missions — and the show has been steadily peeling back layers of Yu Bo Na’s traumatic backstory, including her time surviving an abusive orphanage director.

![A Bona Fide Killer](https://technosports.co.in/wp-content/uploads/2026/09/A-Bona-Fide-Killer-ffr-819x1024.jpeg)

### What’s Coming in A Bona Fide Killer Episode 13

| Detail | Information |
| --- | --- |
| Episode | 13 |
| Air Date | September 11, 2026, 9:50 PM KST |
| Key Reveal | Yu Bo Na’s past in Russia with Sergei |
| New Threat | A copycat killer framing Kingfisher |
| Where to Watch | Viki (with subtitles) |
| Lead Cast | Kong Hyo Jin, Lee Sang Yi, Jung Jun Won, Shin Hyun Soo |

### Sergei and the Russian Connection

The episode’s biggest reveal centers on Yu Bo Na’s history with Sergei (Shin Hyun Soo), a former partner-in-crime from her assassin days in Russia. Their shared past is expected to finally explain what drove her to relocate to Korea in the first place — and Sergei’s real reason for tracking her down now adds fresh tension to an already complicated relationship.

### The Copycat Problem Escalates

Meanwhile, the investigation into Kingfisher takes a darker turn when an innocent civilian becomes a shooting victim. Detective Lee Dong Jin (Lee Sang Yi) notices the crime doesn’t match Kingfisher’s usual methods, prompting him to dig deeper — and uncover evidence that could change the entire case.

This copycat crisis puts Yu Bo Na’s own Sales Team 3 in an unusual position: they must now investigate a killer impersonating her before public opinion turns irreversibly against Kingfisher’s reputation. It’s a clever narrative device that mirrors real crime-thriller storytelling, where impersonation crimes often complicate investigations by muddying established criminal patterns and forensic profiling.

### Why This Episode Matters

With Kwon Tae Sung still guarding her secret and Lee Dong Jin closing in from the investigative side, Yu Bo Na is being squeezed from multiple directions. Add a copycat killer actively trying to sabotage her credibility, and Episode 13 sets up what looks like one of the season’s most pivotal turning points.

If you enjoy following how K-dramas blend workplace comedy with high-stakes action storytelling, our team at [TechnoSports](https://technosports.co.in) regularly covers entertainment trends across global streaming content — worth a look for fellow K-drama fans.

### Catch the Episode

“A Bona Fide Killer” Episode 13 airs September 11 at 9:50 PM KST, with subtitles available on Viki for international viewers following Yu Bo Na’s double life.

## FAQs

### **Q1: When does A Bona Fide Killer Episode 13 air?**

It airs on September 11, 2026, at 9:50 PM KST.

### **Q2: What is A Bona Fide Killer about?**

It follows a secret sniper balancing motherhood and office life while hiding her identity as an assassin known as Kingfisher.