When the Yuan army attacked Japan, the monsters from mainland China also crossed the sea to Japan in order to obtain the souls of the dead. Here, they encountered Inuyasha's father, Toga. After a hard battle, the mainland monsters were finally sealed in Toga's teeth. Time went back to the Warring States Period, and a fragment of the Four Souls Jade flew to the Forest of No Return, awakening Manjumaru, the son of the leader of the mainland monsters. In order to unlock the power sealed by Toga's teeth, Manjumaru sent his followers Liuli and Glass to lead Inuyasha and his party to the Forest of No Return, and induced Inuyasha to cut off the barrier with Tessaiga. The barrier disappeared, and the power that had been sealed for hundreds of years began to revive, and Manjumaru became stronger. At the same time, Glass and Liuli took away Coral's mica and the wizard's wind cave respectively, causing Inuyasha's side to fall into a bitter battle; on the other hand, Kagome's consciousness was controlled by Manjumaru, and she had to seal Inuyasha again with an arrow, and then was pushed into the dry well by Kikyo, traveling through time and space back to the modern era...