During their summer break by the seaside, high school friends Mayumi and Kiwako stumble upon a lost camera that sparks Mayumi's curiosity. Developing the film reveals an unsettling photo of Mayumi with a stranger, from a camera model yet to be released. With Kiwako's brother's aid, they delve into the mystery, leading Mayumi down a rabbit hole of obsession to uncover the camera's secrets. In another peculiar tale, airplanes vanish into thin air, transforming into massive carp. Simultaneously, a detective explores a decrepit apartment and encounters an enigmatic man and a girl fixated on fish. As he puzzles over the strange pair, a cryptic note hints at a legacy waiting to be unraveled by his successor.