DEF CON is the world's largest hacking conference, and every year it bans cameras and recording devices from its halls. For its 20th anniversary in Las Vegas, the organizers made an exception, letting a documentary crew shoot the full four days of talks, contests, and hallway conversations. The film moves through badge-hacking workshops, lockpicking villages, and the social engineering competitions the conference is known for, mixing footage of attendees and staff with interviews about how a gathering that started as a small group of phone phreaks and hackers grew into an event drawing thousands. It traces the culture's own tension between secrecy and openness: a community built on breaking into systems that also has to decide, once a year, whether to let itself be filmed. Written by internet historian Jason Scott, the film treats DEF CON less as a spectacle than as a case study in how a subculture builds trust, rules, and an identity over two decades.