The protagonist, Chiharu Izuki, lacks self-confidence due to the trauma of once being kidnapped, and spend her days unable to help anyone at all.
One day, while searching for a missing person at her detective agency job, she comes cross the mysterious app “Protea.”
It was a crime prediction artificial intelligence developed by the Metropolitan Police Department and currently being tested in the Shinjuku Ward.
Guided by Protea’s predictions, Chihari encounters various incidents.
She meets a detective who asks for her cooperation, a mysterious boy who for some reason appears at the scene of the crime, and others.
Chiharu’s new life of cooperative work to prevent incidents before they occur has begun…!