The Drifters are a league of exemplary warriors from across history - the samurai Shimazu Toyohisa, the ninja Nasu, a World War 2 pilot, an Imperial Japanese naval officer, and a host of others - brought to an alternate Earth to fight and destroy the Ends, a similar group who have decided to take over the Earth instead of protecting it.

After two years of studying within the Reiken clan, Ōriku and other inexperienced disciples are ordered to descend to the temporal world for further studies, and Ōriku embarks the journey back to his birthplace.