Impoverished governess Susannah Thorpe suddenly inherits a house on the Cornish coast. The catch to this happy news is that she must spend thirty days in the house if she wants the fortune that goes with it. She is surprised though when she arrives at the house, with her friend Constance, to find a mysterious man in residence as the current tenant, along with his companions. What is he up to? And will he let her fulfill the terms of the will?