What happens in the 3rd Inuyasha movie?

Answer 1

The movie begins with a flashback to the night Inuyasha was born, and shows the events surrounding his birth (including his father, Inu no Taishou's, death). It then jumps forward to Kagome's time, where her grandfather has just brought out an heirloom sword said to have belonged to the god Susanou. Little do they know, however, that the sword is in fact Sounga, an evil demon weapon which once belonged to Inuyasha's father, and which was sent to the present day for safekeeping. The sword breaks free of its seal, and Inuyasha must try to subdue it before its destructive power opens a gateway to Hell, swallowing the mortal world. However, the key to destroying the sword lies in Inuyasha cooperating with his older half-brother, Sesshomaru- something which, at first, seems quite unlikely, as they generally appear to hate each other. However, although Inuyasha insists on going it alone, Sesshomaru (of all people!!) ultimately sacrifices his pride (to some extent....) and joins forces with his brother to destroy the evil weapon.