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. 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?