But beneath the gaiety of the house-party, something far more serious is taking place. The Foreign Secretary, the American Ambassador and the Head of British Intelligence are awaiting the arrival of a foreign scientist carrying secrets of international importance. It's a matter of some delicacy, and they're anxious to keep it strictly confidential.
As the celebrations get underway, however, Angela senses a growing disquiet within the castle. The expected guest fails to appear, the snow falls ever more heavily, and the festivities take a sinister turn when a game of sardines leads to the discovery of a dead body.
Cut off from the outside world by a blizzard, the guests at Fives Castle soon realize that one of their number is both a spy and a murderer, and before long suspicion falls upon Angela herself…
A classic 1920s mystery, perfect for fans of Agatha Christie, Dorothy L. Sayers and traditional British whodunits.