After terrorists steal a top-secret virus, the nation's top covert agent Gabe Logan is sent to stop them and recover the virus. He is assisted by teams from the US Army Chemical and Biological Defense Command (CBDC), and Lian Xing, who stays in close contact with Gabe throughout his missions. Guide Logan as he travels through parks, subway tunnels, a museum, and a military compound on his world-saving mission. Along the way, Gabe will face many dangerous enemies, but he can take them out with a quick shot to the head. The fate of millions relies on the skill of one special agent.