Hampshire, 1938.

When prominent judge Sir Giles Drury starts receiving sinister letters, his wife suspects Victor Silvius, a man confined to a sanatorium after attacking Sir Giles. Meanwhile, Silvius’ sister Caroline is convinced her brother is about to be murdered... by none other than his old nemesis Sir Giles Drury.

Caroline seeks the advice of Scotland Yard’s Inspector Flint, while the Drurys, eager to avoid a scandal, turn to Joseph Spector. Spector, renowned magician turned sleuth, has an uncanny knack for solving complicated crimes – but this case will test his powers of deduction to their limits. At a snowbound English country house, a body is found is impossible circumstances.

Spector and Flint’s investigations collide as they find themselves trapped by the snowstorm where anyone could be the next victim – or the killer...