A rich woman and her maid are found murdered in an old castle. The only witnesses are a dog, and ghosts which seem prone to reveal the truth. Fascinated by divination, the superintendent's mother fully intends to participate in her son's investigation.

Avril comes to a dying man's rescue on a cliff. While she hears his last words, she notices a small woman's portrait next to him. She seeks help at the nearby village, but when she returns, the man has died and the photo is missing.