Two boys born eighty years apart and on opposite sides of the world meet via a secret time-spanning doorway underneath the British Museum. But their meetings has unintended consequences as history takes a swerve and suddenly the Nazi's have won World War Two and everything has gone wrong. With the help of King George VI (locked up in the Tower of London) and his second daughter, the boys must figure out what went wrong and put it right or nothing in the past, the present or the future will even be the same again.