In a world where humans and robots live together, there exists a doomed city named "Romdo". Under full management control, it is a paradise which does not need feelings. But this Utopian landscape is soon broken by a series of mystifying murders. Re-L Mayer, a female inspector from the Citizen Information Board, is tasked to solve the murder cases. As she digs deeper, she is soon entangled into the mystery of the "Awakening", which will change her life, and the lives living in Romdo.. forever.