It appeared on planet Earth from an unknown origin - seemingly by someone's inexplicable whim. Something that possesses eternal life, a "leaf in the wind". At first, it appeared in the form of a stone, then transformed into moss and took on the appearance of a deceased animal, and eventually gained consciousness. It moved across snowy meadows, although it didn't understand where it was going or why... And then it met a human. A lonely young man who lived, and then, alas, perished...