Mystery Mansion (1984)

Susan and her brother Johnny go to spend the summer with their aunt and uncle where they discover a map that may lead to some sort of treasure Susan had been having nightmares about a girl Rachel who disappeared in a nearby mansion now old and abandoned Eventually Susan and Johnny along with their cousin Billy begin a quest to find the treasure as well as the answers to Rachels disappearance While they are doing this 2 escaped convicts are also looking for the same treasure