This is a really exciting action pack movie. Get to see a bit more history of Inuyasha parents. Feel great to watch it again after many years. General Inu was really a great demon, holding 3 swords that can rule heaven, hell and earth. The sword of hell So'unga is pure evil and gain control of anyone who holds it. Only Inuyasha dad is strong enough to subdue it. Somehow So'unga become a heirloom to Kagome family when they found it in the well. It awaken to wreck havoc. Inuyasha bring it back to his era trying to subdue it but fail. Kagome manage to shoot the pure arrow to dispel it off him. So'unga resurrect Takemaru of Setsuna, the man who love Inuyasha mum Izayoi and killed his father. Making use of his vengeful heart, Takemaru want to kill the 2 brothers. Saya the guardian of So'unga says only by combining the powers of Tetsusaiga and Tenseiga can they defeat the evil sword. Inuyasha and Sesshomaru each try to fight their own battle against Takemaru but can't win. Inuyasha manage to defeat him and make Takemaru see Izayoi is trying to protect him even at the last minute before he fight Inuyasha dad. So'unga fly away and open up the netherworld. Kagome urge the 2 brothers to work together to defeat So'unga. Sesshomaru do have people he want to protect (Rin and Jaken) and he use Dragon Strike, combine with Inuyasha Backlash Wave to overpower So'unga Dragon Twist and seal the sword for good. Their father appear briefly and is glad they both work together.