"If a world can be seen in a grain of sand, then surely phobia can be found in a handful of dust, or so contends obsessed British housewife Marcia, as she does endless battle with dandruff, the carapaces of roaches, grease, rust, grit, the whole panoply of household detritus. Terrorized by the imminent arrival of her coffee-morning ladies, she vacuums the carpet, only to be bested by the spirit Mucor, whose Latin name embodies all elements of slime...