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?