Near-future Seoul, 2025. Technology is omnipresent, but its complexity often buries its secrets behind layers of obsolescence and cryptic code. The protagonist, Ji Hun, is a freelance app developer with a knack for reverse-engineering old software. One rainy evening, he stumbles upon a corrupted RAR archive shared by a friend: xFadsk2017x64.rar . The file, flagged as potentially harmful, resists extraction, its metadata stripped of any useful information. The name itself feels anachronistic—a relic from 2017, the year Ji Hun left his corporate job to focus on open-source development.