Trapped in a Duel to the Death!

what happens

While Inuyasha's gang follows a demon bear with a jewel shard, Koga meets with some demons from the northern pack who tell him about their plan to storm a castle where a man has many jewel shards. When the chase leads Inuyasha and his comrades to the castle, they meet up with Koga, who is furious at the slaughter of the wolf demons.