A man wakes up in a place he doesn't know. He has to travel and search for peaces of his memory while being stuck in a game. The only way he can learn more is by leveling up.
When a hard criminal is brought to a secret facility for testing, the outcomes are very, very scary. This man was once a man working under his own roof, a criminal mastermind and an expert in combat. When his mind becomes corrupted and is brainwashed into what these "Scientists" want him to do, this highly skilled, highly trained, killer becomes a psychopathic killer that lurks noiselessly in the shadows.