Teggs, Arx, Iggy, and Gipsy are sent to the farm planet Noxia-4, where they discover that something's gone badly wrong: crops are failing and that the lambeosaurus farmers who work there have been vanishing. The astrosaurs discover that a group of carnivorous giganotosaurus are at work on the planet, and suspect them of poisoning the crops. They also find a sinister species of plant, the insect-eating fearblooms...