15 years in his future, Miyamoto Usagi fights with Lord Noriyuki's Geishu clan, in an all-out war against the treacherous Lord Hikiji. In the fury of the final battle, a mysterious metal rocket crash-lands from the heavens, shattering both armies and igniting a new, more devastating conflict. It will take all the considerable fortitude, ingenuity and heroism that Usagi and his loved ones can muster to combat the fearsome extra-terrestrial war machines and halt the alien invasion. In the end, not everyone will survive to tell the tale.