The Invisible Fear plot
Sylvia Langdon is engaged to Bentley Arnold. She is also desired by Arthur Comstock, a cousin of John Randall, who is a partner of Marshall Arnold. Sylvia accompanies Arthur at a country club horse race, but is thrown from her horse. A storm hits them and they take refuge in a lodge. Here Arthur tries to make love to Sylvia and during an argument she hits him on the head with a heavy candlestick. She flees the lodge and when she turns around, she sees it going up in flames. John Randall discovers that Arthur has taken a will from his desk and sets out to find him.