Actually, Stone Mirth, a volcanic stone, would like to live up to his name and he would have a reason to be happy because as a Martian stone he has many abilities that earthly stones do not have. However, he finds himself subjected to constant oppression and teasing from his peers in his homeland until one day fate offers him the chance of a lifetime and sends him to Earth to act as a hero and save the planet from the conquest of an otherworldly, diabolical