Sometimes just known as “Q”, this is a 1982 movie starring David Carradine and Michael Moriarty. Shepard (Carradine) is a New York City Cop investigating a series of ritual homicides. Bodies turn up mutilated in ways such as having the hearts cut out. Meanwhile, Jimmy Quinn (Moriarty) is a piano player and petty criminal who gets caught up in a jewelry store heist. When things go awry, he flees with the stolen jewels, abandoning his fellow crooks. He hides the loot in a forgotten attic space at the top of the Chrysler building, and there he finds an enormous nest near a hole in the roof.
The two plot lines come together when Shepard figures out that an Aztec cult priest has been convincing victims to be semi- willing human sacrifices as he prays the ancient Aztec serpent god Quetzalcoatl back into existence. Quetzalcoatl nests in the top of the Chrysler building, flying out on occasion to snatch unsuspecting New Yorkers from rooftops. Jimmy lures the other crooks to the nest and cheers as Q devours them. Then, for a promise of immunity and one million dollars, tax free, he informs Shepard where to find the nest.