Out of the four Inuyasha film installments, this is probably the best in terms of plot. We get to see a little more about Inuyasha and Sesshomaru's father, the dog demon. In addition, we get a better understanding about the heirloom swords that passed down to to both Inuyasha and Sesshomaru: tessaiga, tenseiga, and a third that was not passed down to either: sounga. The film focuses mainly around Inuyasha, Sesshomaru and the third sword along with the story behind it. I won't be going into details about the plot since it'll give away spoilers. Also, best part about the film, we get to seemore of Sesshomaru.