Darkness and light are one; when the light is strong, darkness vanishes, and when darkness is deep, light sleeps. A good person cannot endure darkness for long and will eventually turn towards the light... John Faust is a promising stockbroker on Wall Street. However, everything changes after Black Monday, when the stock market crashes. With John having lost everything and sunk into despair, X-White and X-Black make a bet. X-Black, Gretchen, approaches him and extends a hand of temptation, but despite Gretchen's warnings, John accepts X-Black's offer and is gradually consumed by it. As John falls further, Gretchen's physical and mental condition deteriorates. Seeing John, who even tries to turn away from Gretchen, the last vestige of goodness and his most beautiful existence, X-Black is confident of his victory, but X-White says it's not over yet...