Shinbi is not a particularly ghosty ghost. At night she likes making tiny bouquets of things, and gazing at the far away stars. Haunting? Not so much. Even if that's what the other ghosts like. In the daytime, in a meadow, sits a single rock, casting a single shadow, named Greem. He'd really like someone to talk to. But who? He writes one word on his lonely rock: "Hi" and hopes someone will see it.

Sure enough, in the darkness of night, Shinbi finds the note! But who could have written it? In a profound exploration of how friendship can break through barriers of time and circumstance, Cat Min introduces us to two unforgettable characters we'd all love to know.