Told through the perspective of his sister in poetry, prose, and the sign-language alphabet, when hearing-impaired Carlo begins to lose vision in his only functioning eye he must undergo an operation to try and save his vision.
Miss Bianca, a white mouse of great beauty and self-confidence, travels with the ambassador's son to Norway on behalf of the Prisoner's Aid Society in a perilous mission to rescue a poet imprisoned in the dreadful Black Castle.
When left to take care of himself, a young boy becomes involved with a community of intelligent lizards who tell him of a little known invasion from outer space.