Why are they after Jian in A Shop for Killers?

Jeong Jian did not ask for any of this. She's a college student whose uncle just died, allegedly by suicide, and she came home to grieve. Instead she got drone strikes.

By the end of episode one, professional killers are trying to get inside her childhood home. By the end of season two, which wrapped on Disney+ on August 12, she's running the business those killers were sent to seize. So let's back up.

The store is the problem

Jian's uncle Jeong Jinman (Lee Dong-wook) raised her after her parents were murdered. What he did not mention over dinner is that he ran Murthehelp, a dark-web shop that sold military-grade weapons to people who should not have them. The house Jian grew up in is sitting on top of an arsenal.

When Jinman "dies," the vault doesn't die with him. It passes to the one person who has the keys, the codes and his last name.

They were never after a girl. They were after a login.

Who, exactly, is "they"

The show is generous with villains. A quick roster:

• Babylon, the shadowy mercenary outfit Jinman used to work for before he walked away with their secrets. They want Murthehelp's client data and access codes, and Jian is standing between them and both.
• Bale (Jo Han-sun), Jinman's old Babylon colleague, a man who does not blink and does not forgive. Season one makes clear he's tied to the deaths in Jinman's family. This is personal for him.
• Season two's new crop, including Babylon's regional command and a Japanese contingent led by Kusanagi, who at one point sends Jian a video of her uncle being tortured, because Babylon has an HR problem.
• The people who look like help. The first season's nastiest twist is that the nice boy hanging around Jian is not a nice boy. Trust no one under 30 in this show.

Why Jian doesn't just leave

Because the show gives her the exit and she declines it. Midway through season one she's offered a clean identity and a new life, and she chooses the house, the store and the fight. Kim Hye-jun, who plays her, told TV Guide that this is the moment Jian stops running from what she is: "She has what she needs to become a killer, because she's the niece of Jinman."

Lee Dong-wook, in the same conversation, framed it less as killer instinct and more as family: Jinman and Jian were effectively father and daughter, and protecting his legacy is what a daughter does. Both things are true. That's the fun of her.

Jian isn't the target because she's weak. She's the target because she's the heir.

What season two changes

Season two hands Jian the CEO title at Murthehelp and brings Jinman back from the dead (he was never dead; this is a Lee Dong-wook show, he does not die). The two of them go to war with Babylon, Jinman lets himself get captured to lure them out, and Jian and the Code Reds storm the compound to get him back.

Season one was Jian surviving a life she didn't choose. Season two is Jian choosing it. There's a finale exchange where Jinman asks her what comes next and she just tells him to listen. Whether that's a season three hook or a mic drop depends on Disney+, which hasn't said either way.

The actual answer

They're after Jian because she has the keys to the most dangerous store on the internet, because she's the last living leverage over the man who built it, and because, as of season two, she's stopped being leverage and started being the boss. That's a much bigger problem for Babylon than a scared kid in a house ever was.