Detective Takakura Sou at a young age witnessed his father’s murder. Pledging to catch his father’s killer, he grows up to become an elite cop in New York City. Detective Takakura Sou comes back to Japan after spending many years in America in pursuit of his father's killer, a drug organization leader named Jinno. Once back in japan he is team up with, Kudo Maruo, a detective from a special investigative division. His personality, interests, and investigation methods are completely mismatched with Takakura's, but the two somehow work together to crack the case they've been given.