Plot Recap:
After finally getting along for a while, Kagome and Inuyasha meet Myoga the Flea, a friend/ advisor of Inuyasha's deceased father. Shortly after, they meet Inuyasha's older half-brother, Sesshoumaru, who has been searching for the entrance to their father's grave. He discovers it lies in one of Inuyasha's eyes and sets a trap using the image of the half-demon's mother. With Kagome's help, he is able to break free of the illusion as Sesshoumaru decides to strike—removing Inuyasha's pupil to open a portal to their father's resting place.

Episodes 5-7: Aristocratic Assassin, Sesshoumaru

A Sword Worth Fighting For
(Lyrics to the tune of A Girl Worth Fighting For, Mulan)

After the black pearl was removed from Inuyasha's right eye, he collapsed to the ground as Sesshoumaru tossed one casual glance back at him before jumping through the black portal. Inuyasha steadies himself, ready to go after his despised half-brother

Inuyasha: For a long time I've been waiting for this battle
Kagome: If you're not careful, he'll slaughter us like cattle
Myoga: But you have to go, now don't be slow
I: Time to settle the score!
M: Oh, it surely is a sword worth fighting for
I&K: What?
M: That's what I said! A sword worth fighting for
A sword that glimmers in the moon- a blade that truly shines
I: Your sword is useless junk to me! My strength will work just fine
K: I don't care what sword you wear or what it looks like
But if we don't go now he'll get away! Move! Come on! Ugh!

Tired of listening to Myoga and Inuyasha's banter, Kagome takes the initiative and jumps through the portal after Sesshoumaru before it closes. Shocked, Inuyasha leaps in after her. They land on a skeleton bird and fly over the huge remains of his father.

I: Hey Myoga, is this sword so great, why bother?
M: This tremendous sword once belonged to your father
And remember this; his dying wish is you wielding that sword
That's what makes it a sword worth fighting for

Landing within the bones, they come in contact with Sesshoumaru who is scowling at the sword stuck in the grave. There seems to be some kind of force field around it, leaving the demon unable to remove it. Inuyasha and Sesshoumaru begin to battle as Kagome tries to stay out of their way. She encourages Inuyasha to pull the sword to dent his brother's ego.

I: It's too bad you can't touch the sword
I guess that makes it mine!

Inuyasha pulls at the sword only to find he couldn't remove it either. Frustrated, he continues to fight and chase after Sesshoumaru. Kagome watches worried.

K: Oh, Inuyasha look out! Hey wait! Don't dare leave me behind—

Perusing the fighting demons, she accidentally removes the sword with ease.

I&S: What?
K:Oops?

Frustrated, Sesshoumaru attacks Kagome and her form crumples under the acid. Inuyasha is deeply angered and continues fighting in anguish.

S: Human love had made you weak just like your mother
K: Hey, I'm not dead! Now it's time to beat your brother
I: You're alive!
K:Oh god, a giant dog—
I: Did he have to transform!?

Inuyasha tried fighting his brother's true form with the old sword, but it had no effect. Frustrated in battle, he ops throwing the sword away but Kagome encourages him to use it, much to his annoyance.

I: How is this junk a sword worth fighting for?
K: It's gotta be a sword worth fighting for!
I: Shut up and be a girl worth fighting—

The rusty sword transformed into a huge fang - powered by his will to protect- allowing Inuyasha to cut off one of his brother's arms causing him to flee. He and Kagome successfully leave the grave with a new weapon.