Yusuke's three-day weekend is cut short when Botan delivers his next big case. Genkai, an aging psychic, will hold a contest to find a worthy apprentice to her powerful technique: the Spirit Wave. But an evil demon, Rando, plans to steal the technique and use it for mass destruction! Yusuke must go undercover and infiltrate Genkai's compound!

One of Yusuke's teammates has been badly injured, and Kuwabara insists on fighting the next enemy all by himself -— revealing his amazingly improved Spirit Sword! Before the bickering group can disagree, a ferocious roar slices through the castle. Byakko, the second Saint Beast, is waiting!

Suzaku uses The Prism of Seven technique to create seven Suzakus. Not merely copies, each one has independent will and full powers - all aimed at the torture and annihilation of Yusuke.

Hiei takes on Rokuyukai’s leader, Zeru, whose explosive fire attacks ravage the stadium. Hiei must resort to an unbelievable technique, one that could take his life as well: he must summon the power of a dragon.

Okay, brief recap to what happened last episode: Kurama has just had his arms and legs frozen, but used his spirit energy through his hair when he used the rose whip to slice Gama apart. And like in the last episode, Gama tries to hit Kurama through his wounds, splattering his blood all over him. Right before he dies, Gama tells Kurama that his blood has sealed his spirit energy. Uh-oh. To make matters worse, the next member, Touya is ready to fight and avenge his dead teammate. Touya attacks just as Gama's first spell wears off, allowing him to move, but with his energy still sealed, he's still in a bad situation. Kurama spends all of the time trying to keep himself from getting killed by Touya's attacks. Eventually, he forms a plan to defeat Touya, and gets himself cut on purpose to plant one of his death plant seeds inside his own body right so it can manifest as a weapon.

This episode starts with Jin in the air with his Double Tornado Fist ready for the kill. All of a sudden Yusuke says, ""Time for something stupid."" His body becomes surrounded with spirit energy. Everyone is surprised-Botan, Kuwabara, Kayko, Koenma. Then Jin attacks with the first tornado fist. Yusuke somehow catches the fist. Jin exclaims, ""No one can catch a tornado!"" Yusuke throws the fist, rendering it useless. When Jin attacks with the second fist, Yusuke catches it with his foot. He also makes the Tornado Fist useless. He yells, ""SPIRIT WAVE"" and a punch full of blue energy nails Jin right in the stomach. Jin goes flying in the air. The Masked Fighter explains that the Spirit Wave is like Yusuke's shotgun attack and that he must have learned it from Genkai. In the stands, Kayko is shocked, but Shizuru says, ""Let's move."" All of a sudden, a sparkle is seen in the sky and Jin's body comes crashing down in the stands. Koto makes a ten count, and Yusuke is the winner.

With both Ura Urashima and the newly transformed Yoko Kurama trapped in the ring, the true battle begins. Yoko finally shows himself, and unleashes an attack known as the Death Tree. Yoko Kurama demands that Ura Urashima tell him the secret of the Idunn Box. Ura says he doesn't know, and that he only joined Team Uratogi because Shishiwakamaru promised him riches. Yoko knows he's lying, and threatens to kill him. Ura finally starts telling the truth. He says that he's not even Ura Urashima,and both Kuro Momotaro and Makintaro weren't who they seemed either. That they were together when Shishi and Onji showed up, and he's about to say something else when a sword flies into the ring, and hits Ura, changing into a wolf-like creature. As the smoke clears, we see that it was Shishi that threw the sword. Juri then declares Kurama the winner. Shortly after the smoke clears, Kurama turns back into his regular form.

The tournament finals are set to begin. But the rules state that each team must have five members to compete. With each team having only four fighters, two competitors step up to join with each team no matter what the consequences. Who are the two new fighters and what could they possibly bring to the team?

Hiei unleashes his most powerful attack, the Dragon of the Darkness Flame! But Bui is able to turn the Dragon against his master. Will Hiei be swallowed and destroyed by his own power?

As one of his friends lies on the arena floor, Yusuke powers up to the same level as Toguro. To defend himself, Toguro must power up to 120% of his capacity. Can either fighter, each completely devoid of any remaining energy, survive to claim the prize?

As the epic battle between Yusuke and Sensui continues, Yusuke learns that he is no match for the former Spirit Detective. As Sensui prepares the finishing blow, aid comes in a most unexpected package. And what is the truth behind Sensui's unique personalities?

After being saved in the nick of time by Puu, Yusuke revels in his new power and resumes his battle with Sensui. Although Yusuke's skill and strength have increased, he is still clumsy with his new abilities. But there is no time to practice as Sensui bears down for the final confrontation.

Yusuke struggles to continue his fight with Yomi and as his demon blood continues to flow through him, his demon engery also flows out.