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Inukai Tsuru (Taira Yuna), who suffers from prosopagnosia, an inability to recognize human faces, is a police officer on leave due to mental health issues. One day, Tsuru happens to be at a convenience store and gets caught up in a robbery, where she meets Saruwatari Hibiki (Maruyama Ryuhei), who has been transferred from the Metropolitan Police Department. Tsuru has an outstanding memory, while Saruwatari is unconventional and intuitive . These two polar opposites join forces to tackle an unsolved case: a hit-and-run involving a bear. The mystery of the "black bear" and the "white bear" emerges. And what is the surprising truth that Tsuru's memory leads to?