Miss Bianca, the elegant mouse Chairwoman of the famed Prisoners' Aid Society, drew in her breath. "The prisoner," she said gravely, "is a little girl of eight. She has been kidnapped by the wicked Grand Duchess and is imprisoned in the Diamond Palace." Careful plans for the rescue are laid, but even the best plans can go wrong. Luckily Miss Bianca has more than her share of wiles and wit.