Is it possible to see a ghost? Brother and sister Lisa and John and their guardian Mr. Spencer know the answer to this question. All you need is a camera, a photographic plate and some cotton wool. With these simple props, the heroes travel around different cities and deceive people who want to establish contact with the other world. After the end of the Spanish flu epidemic, there are plenty of people who want to communicate with departed loved ones. But one day they come to a house where the line between the world of the living and the dead is very thin, and ghosts really exist...