I saw this on TV as a child and found it very creepy. Since I have not been able to find it from that time, I cannot say if my views have changed. My memory is a little vague, but, as I recall, a woman has problems with somnambulism--she walks in her sleep. One night while sleepwalking, she discovers a secret passage in the house where she stays. From some sort of a balcony, she witnesses a murder. When she awakes, she is uncertain of whether it is real or a dream. Everyone else dismisses it as a dream. Apparently, she cannot positively identify the murderer, so she does not know who to trust. I have always thought this was part of Hammer's House of Horror series, but apparently it is not, yet it very much has the same look and feel. I would like to have given a better review, but since I cannot find it, it is difficult to remember the details. I DO know that I liked it. Since no one else has yet to review it, I thought perhaps my review might spark the memory of someone else who has seen it and might review it in more accurate detail.