Svengarlic, a German musician, discovers by accident that he is a human magnet. While playing the piano at a friend's studio he meets Frilby, the artist's model, who insists he hear her sing Ben Bolt. Her singing is bad. Svengarlic tries his powers. While under the mesmeric spell she sings so well everyone is held under the spell. Svengarlic arranges a concert to make her debut. Frilby enters, but cannot sing. Svengarlic from a box makes the mystic passes, but his power is waning. He hurries away to the city power house to absorb more of the deadly current, only to find the engineer on the lookout. Frilby's young lover having watched Svengarlic on a previous trip to the power house bribed the engineer not to allow Svengarlic in, and to stop the dynamo at 9 o'clock. Svengarlic runs madly back to theater, where everything is in an uproar. He enters, but his power is gone. Frilby's lover jumps upon the stage, takes her in her arms and rushes out.
—Moving Picture World synopsis