New York City is being plagued by a pack of ferocious brass raptors attacking people and carrying them away into the night. The originator of these skeleton-like creations is a deranged military scientist, who is also part of a plot to escalate the cold war with Britain into a full-blown conflict. He is building a weapon - a weapon that will fracture dimensional space and allow the monstrous creatures that live on the other side to spill through.