Ryusuke Tsukumo is a quirky, yet brilliant neuroscientist working for the National Research Institute of Police Science. Wielding a unique perspective and psychology, Tsukumo tackles the nation's most baffling crimes and scandals, going head-to-head with the most brilliant and twisted criminal minds. But his eccentricities and poor social timing can also aggravate people and circumstances, further complicating matters.

• Takuya Kimura
• Teruyuki Kagawa
• Haruka Ayase
• Hiro Mizushima
• Ichikawa Ebizo XI
• Mao Daichi
• Sei Hiraizumi
• Osamu Shitara