Lin Yi is an ordinary engineering student at a second-tier university in modern Shanghai, hailing from a poverty-stricken village in Guizhou. While his roommates indulge in games and romance, Lin Yi tirelessly balances studies with various businesses to support his family and save money. Despite his unremarkable appearance and humble background, he possesses a sharp mind and an unyielding drive to succeed in the bustling metropolis.

However, Lin Yi harbors a massive secret hidden behind a cracked smartphone screen and a VPN connection. On international forums, he is known as the mysterious 'Third World War Observer,' a figure who casually provides dangerous technical knowledge to foreign entities. After successfully guiding a group to build rockets from steel pipes and fertilizer, he receives a new, high-stakes request for firearms and ammunition.

As Lin Yi smiles at the message, he prepares to leverage his unique position to secure a fraudulent hundred-billion-dollar arms deal, transforming from a struggling student into a global arms dealer overnight.