Team Urameshi prepares to depart Hanging Neck Island the victor of the sinister Dark Tournament to return to the world of the living leaving their fallen mentor and friend behind. But somewhere far away a chance encounter between two former allies seems to hint at what is to come as the most unlikely of people reveals a most shocking secret.

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?

Yusuke Urameshi is having a typical day. He's cutting class, arguing with teachers and getting into fights with his rival Kuwabara. But then Yusuke does something that betrays his killer rep. He dives in front of a speeding car to push a little boy out of harm's way! Yusuke has sacrificed his life for the sake of another, but is this really the end of this brash young man?

One giant battle stands in the way of rescuing Yukina. Yusuke and Kuwabara versus the leaders of the demon mercenaries, the immensely powerful and bizarre - Toguro Brothers! What will it take to defeat the freakish duo in a fight where anything goes? Elsewhere, Kurama races to stop Hiei, who is entering Tarukane's stronghold with his own violent agenda!

Having rescued Yukina and defeated Toguro, Yusuke is spending some time with Keiko in the city. However, when a huge chunk of building is blown up, Yusuke sees Toguro, and they have a little chat. Turns out that Yusuke and Kuwabara really didn't defeat the Toguro brothers, as they were faking and working for Sakyo, and now Toguro wants Yusuke to enter a competition called the ""Dark Tournament"". Compiled of a group of greedy mafia warlords, Toguro convinces Yusuke, as Yusuke gathers Kurama, Hiei, and Kuwabara for his team, the gang sets out to compete in the tournament.

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.

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.

Fifty years ago, Genkai and Toguro were actually teammates who fought and won their own Dark Tournament, before becoming violently estranged. Yusuke Urameshi arrived just in time to see his teacher slain, and assaulted Toguro in a rage, only to be knocked away by one devastating blow. With the final round of the tournament soon to begin against Toguro, Yusuke must find a way to keep that from happening again.

Yusuke reveals to Toguro that he has not been fighting at full power and removes the Spirit Cuffs, which reduce his power. Finally, a fully powered Yusuke launches an attack at his nemesis. But Toguro too has powered up to his top level and stares down Yusuke's most powerful Spirit Blast.

As Yusuke lies beaten on the arena floor, Toguro taunts the Spirit Detective. Toguro begins to suck the souls of the spectators in order to enrage Yusuke to once again bring out his full power. But Toguro soon learns that the best way to provoke Yusuke is to kill one of his friends!

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?

Yusuke jumps out of his slumber, ready for the final fight against a new fighter named Chu. He’s rude, he’s crude -and he claims to be Team Rokuyukai’s true leader.

After Yusuke and the others make it to the third round, Hiei and the masked fighter get tricked and trapped inside a force field.

Genkai tells Yusuke his final test is to kill her. Yusuke has second thoughts. He meets Genkai in a cave and says he can't do it. She tells him that was the first part of the test. She would not give her power to someone who would kill her. She reveals her source of power is her Spirit Wave Orb. She takes out a bright ball of energy. Yusuke's test is to absorb it. He agrees to the terms, though the test could kill him. She puts it in him. He feels nothing at first, but then he collapses and pain. In a new ring, the semifinals begin. Team Urameshi enters, missing two of their members (Genkai and Yusuke). They are facing Team Uraotogi. Hiei and Shishiwakamaru agree to choose the fight by dice. The first fight is Hiei vs Makintaro. Hiei wips out his katana. Makintaro asks him to make a move. Hiei holds up Makintaro severed arm. Makintaro reveals his attack, the Axe-blade fist. Hiei is too quick for him and stabs his head. Meanwhile, Genkai watches Yusuke suffer through her test.

Hiei continues his struggle against Kuro Momataro, who has just transformed to his second armor of beast, the Phoenix Armor. Kuro decides to show off by transforming into his third, and most powerful armor, the Wolf Armor. Kuro throws his last Steaming Sphere, and he turns into his hideous wolf form. Hiei draws his broken blade, and Kuro laughs, and tells him if his sword didn't work on the first armor, how could it work on the third. Hiei uses the power he stored for his Dragon of the Darkness Flame, and puts into his sword, creating the Sword of the Darkness Flame. Kuro jumps to bite him, and Hiei kills him in midair. Next, it's Ura Urashima vs. Kurama. Ura is a small boy who fights with a fishing pole. He starts swinging it in a circle, and Kurama does the same with his Rose Whip. T

The match between Shishiwakamaru and Genkai begins. Genkai is very weak because she has given Yusuke her Spirit Wave power through the Spirit Wave Orb. Genkai however, has a great deal more wit than Shishi, and really nails him a few times. Shishi then decides to use his second item: the Banshee Shriek. Shishi is really excited beacause he thinks by using his sword to defeat Genkai, he'll become famous. He then shows off his power of the Chorus of a Thousand Skulls on the audience, killing many. Genkai is able to dodge it. After one more chorus, Shishi uses another of his new sword's power, the Death Cage. Genkai and Shishi are surrounded by a barrier of energy. Shishi goes in for the kill with an attack in which he puts his spirit energy into his sword when Genkai catches it and fires the Spirit Reflection Blast, blasting Shishi right through the cage.

In the last match against Team Uraotogi, Genkai overwhelmed Suzuka, an old demon with many tricks and specialties, but little strength. Meanwhile, Yusuke recovers from the torturous absorption of Genkai's Spirit Wave Orb, which promises to give him unfathomable power. Yusuke's team has claimed their spot in the Dark Tournament's final round. Now Team Toguro must try to do the same.

A disappointing verdict is handed down in the Kurama versus Karasu match, reversing Team urameshi's fortunes in the Finals of the Dark Tournament. Hiei seeks to recover from this setback in the ring with Bui, but will the power lurking beneath Bui's armor be too much for him?

During his match with Toguro, Kuwabara is told of Genkai's death. With extreme rage Kuwabara strikes Toguro with the Trial Sword splitting the demon in half! The arena watches in horror as the evil Toguro rises from the arena floor unharmed.

With the Dark Tournament at an end, Yusuke must beign to cope with the loss of his best friend at the hands of Toguro. After Sakyo asks Koenma to take his life, the evil billionaire unveils his final evil plan to destroy the entire stadium with everyone still inside!

Kuwabara was tormented by his rival's death. The loser in all 156 of his brawls against Yusuke , he's now lost any chance he ever had of evening the score! But with Yusuke out of the way, Kuwabara is the new kid to beat... which means he's making plenty of enemies. Yusuke isn't fond of this classmate, but if he wants to win back his life, he will need to give him a ghostly hand.

With two artifacts under his belt, Yusuke heads for his most dangerous challenge yet – the ruthless demon Hiei. But unbeknownst to Yusuke, Hiei is chasing him, and kidnaps his girlfriend Kayko! Unless Yusuke can retrieve the antidote inside Hiei's Shadow Sword, Keiko will become a brainless, monster slave! Can Yusuke close the case?

The candidates for Genkai's apprenticeship have been narrowed to eight. Among them: Yusuke, Kuwabara, and the disguised demon Rando! Genkai announces the final test will be a tournament, fought in total darkness. And Kuwabara's first opponent is swinging a supernatural sword!

Kuwabara's body lays broken. Shorin is nowhere to be found. And with Yusuke's energy dwindling every minute, the evil Rando reveals his true and monstrous form. Now, can the injured Yusuke battle the human-hunting demon and close the case? How can he, when Rando has ninety-nine deadly techniques in his arsenal.

After a harrowing fight on a collapsing bridge, Byakko is seemingly defeated. But as soon as the Spirit Detective team enters the castle's next wing, a fearsome tiger roar bids Kuwabara to round two -- in Byakko's secret lair. Can this Beast be beaten once and for all, in a room of molten lava?