A plantation owner's daughter falls in love with the handsome plantation foreman Andrea, but her father disapproves of the relationship. Andrea is fired, and he runs away with a native girl. To make sure that he will not leave her, the black girl gives him a "magic" potion... turning Andrea into her white slave.
During a party a drunken guest falls from the terrace, killing himself. The police inspector in charge of the investigation suspects all the participants in turn, and mysterious stories come to light.
