A high society Christmas Eve wedding at a remote Scottish castle sounds like the perfect winter getaway for the three Dahlias and their partners - until a snowstorm hits, cutting them off from the mainland, and civilisation. Which, of course, is when the dead body of one of the other guests turns up in the snow outside the family chapel. A dead body wearing a wedding dress and a stolen diamond necklace. The Dahlias were ready for mulled wine, roaring fires, and romance this Christmas. Now, they're on the hunt for another murderer. And if their suspicions are right, it looks like the wedding may be off.