As a young detective who's inherited the name "Raidou", it's your job to investigate all of the strange demon outbreaks around town. The story begins when Raidou receives a call from a young girl. They meet at night, where she begs for someone to kill her. Suddenly, a huge creation, clad in metal armor and a red cape, picks her up and whisks her away. Eventually, this is revealed to be a member of the Army of Ultimate Power, created by a military general named Munakata. But who are they? What are their purpose, and why did they take this girl?
This game is also known as Devil Summoner: Zunoha Raidou Tai Chouriki Heidan in Japan.