In 2192, a new city, Selene, is built on the moon. Over the years, Selene grows larger, more powerful, and more independent of the Earth - to the point that the moon and Earth battle in a war that winds down without a definite victory for either side. In 2242, war breaks out again - the Earth slowly begins to win... except for the efforts of an experimental Selene technology known as Einhänders: flying machines with a 'hand' that allows them to change weaponry mid-battle.