A group of Americans who live together in an old mansion somewhere in Sweden spend their time between working at the local airplane plant and hanging out with their revolutionary friends. Smoke has something going with his boss's daughter, but when the boss finds out, he has some dudes beat up Smoke. This leads to a strike among the workers, and a break between the boss and his daughter who goes to live with Smoke and his friends. In order to save his job from angry stockholders, the boss offers Smoke a sizable amount of money to end the strike; but when Smoke and the guys spend the money on guns things get out of hand.

Vincent Price stars in this early '60s adaptation of Thomas De Quincey's thriller about an opium addict trying to solve a mystery in San Francisco's Chinatown.