Shigofumi primarily centers around a young-looking girl named Fumika who works as a mail carrier to deliver "after death letters" ( shigofumi). These letters are written by people after they die and are delivered to the person the letter is addressed to in the living world. The letters contain things that the now-deceased could not say while they were alive, such as things they wanted to say before they died, or even to inform others about who killed them in the case of a murder. Accompanying Fumika is her talking staff Kanaka which can also float of its own accord and likes to be treated as if "she" were a human.
