After war made the surface of the Earth inhabitable people have hidden in the underground City of Ember. The creators of the city left the important message that will help people 200 years later... if someone will still be interested in the message.
In 1215 English barons forced King John Lackland to sign the Magna Carta reform that took away part of his power. John did not took it well and soon went after the people, who opposed him.
