Opium

English doctor Professor Gesellius is in China researching the effects of opium. He frees a young woman named Sin from a den of inequity run by Nung Chiang. When he sails for home with the girl, Chiang swears vengeance. In England, it emerges that Sin is the illegitimate daughter of one of Gesellius’ colleagues, whose son is having an affair with the doctor’s wife. The son is poisoned and Gesellius becomes a murder suspect. He flees to India with Sin, pursued by the vengeful Nung Chiang. (Berlinale)