Yusuke has reclaimed his life, but has only one day to be revived by someone's kiss -— And that someone might be Kuwabara! Back in the flesh, Yusuke finds he can see supernatural creatures hiding in the living world, and quickly hunts down a demon criminal. With this move, he learns his adventure is only beginning. Yusuke is a Spirit Detective.

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!

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?

Struggling their way to the front gates of Tarukane's stronghold, Yusuke, Kuwabara, and Botan now face a much greater challenge: three notorious demon fighters known throughout Spirit World as the Triad! Can the Spirit Detective team fight three outlandish opponents on after another, and save the tortured Yukina?

Yusuke and Chu, both drained of their Spirit Energy, struggle to win the first round of the Dark Tournament for their team. They agree to settle it with a Knife Edge Death-Match, an intense and fatal arena of combat.

Kurama is unconscious, and getting beaten to death by Baken. The announcer Koto tries to give a 10-count to stop the fight, but Baken ignores her and kicks her out of the ring. Just as Baken is about to kill Kurama, the team captain, Risho, tells him to stop. As it turns out, Yusuke was about to fire his spirit gun right at Baken if he had tried to kill Kurama. Kurama then is tossed out of the ring. Baken is declared the winner. Yusuke then gets onto the ring to confront him. Baken uses a technique built from his sweat to cover the entire arena in mist, so Yusuke won't be able to see now. Baken delivers a few blows, but the barely harm Yusuke, and he then fires a spirit gun through the arena, causing the mist to vanish.

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?

Yusuke, Kurama, Hiei, and Mitarai enter a cavern controlled by the tricky Gamemaster. Gamemaster's territory can be manipulated into a video game, a game where everyone must play by the rules in order to survive. Yusuke's team must win 4 rounds to move on, but is a victory possible against an adversary who can manipulate the rules?