Forever with Lord Sesshomaru Inuyasha : Season 8 Episode 16

Children have been kidnaped, and a group of priests led by Ungai, a powerful priest who hates demons, go after the demon who did it. Ongokuki, a demon that gathers children with a flute, also kidnaps Rin. Inuyasha and the gang run into Jaken, who is looking for Rin and Sesshomaru.