A fierce battle rages in the borderland lying between the world of the living and the afterlife. A mysterious force is attacking Inuyasha and preventing him from obtaining the last Shikon shard. This force claims to be acting on behalf of the will of the shard! Inuyasha also faces the dreaded Naraku, who will stop at nothing to obtain the shard. When all hope seems lost, Inuyasha receives help from a surprising force — his half-brother!