An alien "policeman" arrives on Earth to apprehend a renegade of his own race who impregnates a woman with a potentially destructive mutant embryo.An alien "policeman" arrives on Earth to apprehend a renegade of his own race who impregnates a woman with a potentially destructive mutant embryo.An alien "policeman" arrives on Earth to apprehend a renegade of his own race who impregnates a woman with a potentially destructive mutant embryo.