2112 AD, Tokyo. Two rookies were deployed to Public Safety Bureau Criminal Investigation Department Unit 1. Nadeshiko Kugatachi is an Inspector who had lost her memories, while Takuma Tsurugi is an enforcer with a missing childhood friend. Aloof and unable to comprehend human emotions around her, Nadeshiko meets Takuma, a hot-blooded male determined to become a tough detective. With the encounter of the two polar opposites, the wheel of fate begins to turn. The cases take place in what was once a futuristic city located far away from Tokyo - Sado Floating City. When the truth is revealed, what 'answers' will they choose?