As the realm struggles to maintain an uneasy peace after years of cival war and tyranny, a twelve-year-old orphan and her loyal companion, a grumpy goose, are about to become the unlikely heroes of a radical revolution. Mosca Mye has spent her childhood in a miserable hamlet, after her father was banished there for writing inflammatory books about freedom. Now he is dead and Mosca is on the run, heading for the city of Mandelion. There she finds herself living by her wits among cut-throat highwaymen, spies and smugglers. With peril at every turn, Mosca uncovers a dark plot to terrorize the people of Mandelion, and soon merry mayhem leads to murder ...