To solve the world's depopulation problem, scientists have developed a process known as "pullulation," which transmogrifies birds and mammals into humanoid form. When a terrible accident occurs, the once desolate planet Earth's population quadruples overnight with the appearance of strange new beings known as "Blomers." Now human, or at least human-like, Blomers bring with them certain talents based on their forebears: foxes are mathematically inclined, blue jays are visually artistic and gophers are courageous and strong. But with these aptitudes come a predilection for a free and open sexuality and a tendency toward violence among their own kind. Humans are at best bemused and at worst horrified by the Blomers' bizarre behaviour. Buttoned-down insurance manager Hector Thompson hates two things: change and science fiction. Finding himself in the middle of both, Hector must embark on a road trip across North America to reckon with the full impact of pullulation and what responsibilities he has to the rapidly changing society in which he lives.