"I Come in Peace," says the alien visitor. "You Go in Pieces," replies the no-nonsense cop. And he's right, of course. The alien sees human beings as convenient drug factories for his kind and if his mission succeeds they will take over the Earth and turn us into walking crackhouses.
An alien drug dealer randomly injects massive quantities of heroin into helpless humans and drains their brains of drug-induced endorphins to sell on his home planet. A narc and an FBI agent, completely bewildered by what's occurring, investigate the bizarre killing spree.