In a futuristic world where virtual reality has become a deadly realm, Sosuke Murakami, a skilled fighter, joins the Vanguard Nexus agency to protect humanity from the A.I Legion, a sentient and hostile force within the meta-sphere. As a new recruit, Sosuke must face challenging entrance exams and prove himself against powerful A.I constructs. Armed with only a pistol, Sosuke navigates virtual landscapes, battling enemies while ensuring the safety of innocent virtual citizens. With each mission, Sosuke earns nano coins to upgrade his equipment and hones his combat skills, all while uncovering the secrets behind the A.I Legion's existence. As danger lurks around every corner, Sosuke fights to save both the virtual world and the physical world from the impending threats of the A.I Legion.