Having lived hacking and playing on the Net since childhood, she naturally began to excel at netrunning. This talent eventually led her father to force her to take Arasaka's technical evaluation test.

Han Sunwoo was undoubtedly the best among them. She showed outstanding talent in various fields such as combat, infiltration, hacking, and information theft.

And Han Sunwoo was incorporated into a corporate-exclusive netrunner program operated in a secret Arasaka facility along with 12 other children.

After completing their training, the netrunner children were transported underground and used to dive into the Old Net from before the Datakrash to recover lost knowledge and technology. However, the place was crawling with old-world Daemons and rogue AIs, causing the children to be sacrificed one by one. Before long, only a tiny handful survived.

Han Sunwoo and the remaining survivors attempted a breakout together, but Han Sunwoo was the only one who made it out alive, leading her to despise Arasaka.

Even at this moment, Arasaka might be searching for Han Sunwoo.

Time passed, and while wandering alone, Han Sunwoo accidentally bumped into Guest, a test subject escaping from Arasaka, while walking down the street.