Inuyasha's dad had sealed away an evil Chinese demon 200 years ago named Menomaru except now he has escaped thanks to a jewel shard. Inuyasha and his companions go after him due to the time-imfractions Menomaru is causing. Basically, he is sucking all the power from the feudal Japan error and it is also affecting other time periods, including Kagome's! In a quote from Kagome's grandpa, "Snow Stop Falling."

 

Kagome-Inuyasha Side of Story:

     Menomaru uses a jewel shard to take over Kagome and force her to fight Inuyasha, injuring him pretty badly. We see shadowing back from when Kikyo nailed him to a tree with an arrow. Needless to say, causing Inuyasha pain snaps her out of the imprisonment and she heads for home in tears. After a while at home and a little history from her mother, Kagome walks to the "God Tree" and starts communicating with Inuyasha who is still injured on the other end. Thanks to his pep talk Kagome heads back to the other world.

 

Miroku and Sango side of Story:

     Menomaru's minions Hari and Ruri gain extra powers from Miroku and Sango, namely a Wind Tunnel and Kiara. They force Kiara to fight against Sango until Sango is injured by Kiara. Kiara starts smashing her head against a rock to get rid of the jewel shard placed there. She is freed once again. Miroku fights the other one off Wind Tunnel for Wind Tunnel until the villain is sucked in by her own force. There ends the torment of the minions.