In Tokyo, an impenetrable field known as "Hell's Gate" appeared ten years ago. At the same time, psychics who wield paranormal powers at the cost of their conscience also emerged.
In a post-apocalyptic future humans live in peace with androids in a domed city. However, a strange series of murders has intruded into bored inspector Re-l Mayer's life.
Believing in humanity and order, policewoman Akane Tsunemori obeys the ruling, computerized, precognitive Sibyl System. But when she faces a criminal mastermind who can elude this perfect system, she questions both Sibyl and herself.