"Shigofumi" are messages from the world of the dead to the living that convey emotions such as love, longing, and resentment- things that are often left unsaid during a person's lifetime. Fumika, a quiet and enigmatic messenger, is tasked with delivering these letters alongside her talking staff Kanaka. Their job is to ensure that each shigofumi reaches its intended recipient, regardless of their willingness to confront its content. Through her work, Fumika bears witness to the tragedies of both the living and the dead, discovering their deepest secrets. However, her own past remains shrouded in mystery- who was Fumika before she became a carrier of shigofumi?