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?

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?

Yukina is a beautiful ice apparition whose tears transform into priceless jewels. Now a filthy human crime lord named Tarukane has kidnapped Yukina, planning to extract her tears through torture and make a fortune! Yusuke, Kuwabara, and Botan must quickly mount a rescue mission. But why is Hiei not allowed to know?

Kuwabara's fight with the elder Toguro brother comes to a smashing conclusion, leading into Yusuke's grudge match with the younger Toguro. But before that bout can begin, intrigue at Team Toguro culminates in a shocking proposal from Sakyo and an even more shocking response from Koenma!

After much convincing, Hiei joins Kuwabara's crusade to save his kidnapped comrade. Upon reaching the mysterious Rokurokubi Estates, the three discover Kaitou, who quickly explains the rules of his territory. Can Kuwabara, Kurama, and Hiei be of any use in a place where any form of violence is strictly prohibited.