The novel concerns Henry Merwin, who after taking part in an experiment finds himself 12,000 years in the future. Taken captive by a giant race, he is forced to care for their insect pets. He falls in love with a fellow prisoner, Luellan, but his captors will not allow them to marry. Instead he is forced to go to war with his insect charges. The insects eventually grow to such a size that they take over much of the earth. Merwin returns to rescue Luellen, escaping to her home in Borneo.