An extremely rare bottle of wine (bottled during the appearance of the Great Comet of 1811) is discovered. Margaret Harwood is sent to retrieve it so it can be sold at auction. Oliver Plexico is assigned as her travel guide/bodyguard for the trip. However, other people desperately want the bottle and will stop at nothing to get it. A simple little trip becomes an international chase.

The story is centered on a microcosm of a post-apocalyptic society where food is so rare it's invaluable and is used as currency. The story centers on an apartment building with a delicatessen on the ground floor. The owner of the eatery also owns the apartment building and he is in need of a new maintenance man since the original "mysteriously" disappeared. A former clown applies for the job and the butcher's intent is to have him work for a little while and then serve him to quirky tenants who pay the butcher in, of course, grain. The clown and butcher's daughter fall in love and she tries to foil her father's plans by contacting the "troglodytes", a grain eating sub-group of society who live entirely underground. The "trogs" are possibly the most sensible of the lot, as they see food as food and not money.