Kelly, a health-department investigator in an extremely modern city, can’t hide her anxiety. A food shipment for animals, injected with «steroids» is about to be boarded. The shipment is partially devoured by abnormally sized rodents.
Harris, trainer of a high school basketball team, has to come to the hospital. One of his players is bitten by an animal the doctors can’t seem to identify.
During his visit Harris is introduced to Kelly. Their conversation is suddenly interrupted by the announcement of a street sweeper’s violent death.