The city of Paris wakes to news of a shocking double murder, and what's worse, it seems to have been impossible: the upper-story room was locked from the inside, and though witnesses heard the murderer speak, it was in an unknown language! With an innocent man imprisoned and the police stumped, only Dupin and his ingenious mind can unravel the puzzle. Also features thrilling adaptations of The Mystery of Mary Roget and The Gold Bug, two classics of the mystery genre.