Barely entering adolescence, boy detective Billy Argo suffers a severe nervous breakdown after learning that his beloved sister and crime-solving partner has committed suicide. After ten years in a mental hospital, at the age of thirty he returns to the world of normal people and discovers that it is full of unimaginable oddities. Office buildings disappear for no reason, animals appear without their heads, and city buses are driven by cruel villains, pursuing their unknown nefarious plans.