The Secret of Lismore Castle

The wealthy Selby Cliff lives with his much younger wife, Anita, in a medieval castle on the Scottish coast. He awaits the arrival of Frank O'Ryan, who wants to buy some of Selby's land in Canada, where Selby himself lived for many years. He has no idea Frank is a former sweetheart of Anita, that they've recently rekindled their romance. As mysterious incidents multiply at Lismore Castle, and a curious crime writer appears at the castle to research his new book, more and more evidence suggests that Selby Cliff is not who he claims to be...