Bankotsu, the leader of the Band of Seven, order Kohaku to send a letter stating that he is to recover his precious halberd guarded at a castle. Meanwhile, InuYasha and his companions try to figure out how to pass through the barrier surrounding Mount Hakurei. Bankotsu raids the castle, reclaiming his halberd and murdering the warlords of the castle. InuYasha finally shows up and faces off against Bankotsu.