Fabricated City — Ending Explained

The Twist: The bumbling public defender, Min Cheon-sang, is actually the "planner" behind the frame-up. He services wealthy clients who commit crimes by finding "empty" people (like the unemployed Kwon Yoo) to take the fall. He utilizes a massive hidden server room to fabricate digital footprints.

The Mother's Death: It is revealed that Kwon Yoo's mother did not commit suicide; she was murdered by Min's enforcer (Ma Deok-su's associate) to stop her from proving her son's innocence, and it was staged to break Kwon Yoo's spirit.

The Climax: The team infiltrates Min's data center. Yeo-wool hacks the system while Kwon Yoo fights off the gangsters. They manage to hijack a national broadcast, streaming the footage of Min's confession and the fabrication process to the entire country, effectively clearing Kwon Yoo's name and exposing the conspiracy.

Some critics view the film not just as an action thriller, but as a metaphor for filmmaking itself. Min Cheon-sang represents a tyrannical director who "casts" victims and "edits" the story (evidence) to fit a script. Kwon Yoo's team represents the indie filmmakers or rebellious audience fighting to reclaim the narrative.
Another reading suggests the entire third act retains a "game-like" quality because it is Kwon Yoo's fantasy projection—a way to cope with the trauma of prison—though the text presents it as reality.