Kai Eto may look like a squeaky clean kid, but the Greater Kanto Narcotics Control Division's new investigator hides a violent alter ego and a dangerous past. Together with his stoic partner Hal Kurabayashi, Kai is assigned to track down and stop the distribution of a dangerous new drug--Dragon Speed. A night on the town with fellow NCD employee Mari turns into a nightmare for Kai when they get mixed up with the Ryugen drug ring in a deadly case of mistaken identity.