 Heavy snow is falling in Dartmoor and the shadowy guests in the local hotel decide to take part in a séance in order to amuse themselves. But the evening takes on a more sinister edge when the table-turning suggests Trevelyan, an infamous local, is in danger. Meanwhile at Sittaford house Miss Marple finds a death threat sent to Trevelyan. Burnaby, Trevelyan s loyal right hand man, is so concerned for his friend s safety that he wants to check on him. Unfortunately, Trevelyan is staying at the hotel - six miles away and, with snow drifts blocking the roads, someone will have to make the journey on foot...