A seance in a snowbound Dartmoor house predicts a grisly murder In a remote house in the middle of Dartmoor six shadowy figures huddle around a small table for a seance Tension rises as the spirits spell out a chilling message Captain Trevelyan dead murder' Is this black magic or simply a macabre joke? The only way to be certain is to locate Captain Trevelyan Unfortunately his home is six miles away & with snow drifts blocking the roads someone will have to make the journey on foot