Gabriel Greene or people know him as a "Agent Shadow" Is a famous secret agent of the government. At his young age, he joined the government and become their precious secret agent, doing a lot of missions with 100% rate of success. He always doing his job perfectly until a new secret agent joined the government and the government trust him to guide the new agent and he agreed to guide this new agent. Little did he knows that the new agent will causing him a lot of trouble in the future.