After talking to Kayko, Yusuke is confronted by Botan. She tells him his Spirit Beast will hatch soon. Koenma startles the two and show Yusuke his big egg. Koenma reminds him that the egg will consume every part of him if he was evil. The egg hatches and no one sees where the beast is. They look at Yusuke and they see the beast. It is a small blue bird with big floppy ears. Everyone mocks him. The next day, the team trys to scope out the competition. Team Uraotogi takes care of Team Gokki 6 in two minutes. Only the badly injured Hiei and Kurama watch the fight. Kuwabara tells them to go to Yukina for healing, not knowing she is Hiei's sister. He mentions her quest and Yusuke and Kurama starts mocking Hiei. Then, Team Toguro shows up. Toguro and his younger brother are there, as well as a guy in black with mask (Karasu) and a guy clad in armor (Bui). The crowd gives them praise. Then Yusuke and the Masked Fight get into a fight. She says she would be a better leader than Yusuke.

As Sensui's plan continues, Kuwabara and his friends attend a rock concert. However, they are ambushed by Sensui's next minion: Seaman, a person with the ability to create monsters out of water. With his friends held hostage, Kuwabara must battle Seaman alone...

Only two hours remain before the tunnel opens unleashing a horde of hungry demons upon the world of the living. Kurama steps forth to battle Gamemaster for the right to move on to Sensui's lair and Yusuke senses that one of them will not make it out alive.

Too late to save their friend's life, Kuwabara, Kurama, and Hiei unleash their most devastating attacks on Sensui, who retreats within the tunnel. King Yama reveals a dark secret to Botan. What news would cause her to tremble in terror? What does King Yama know about Yusuke that the others do not?

As the three strangers in Kuroko's house explain the reason for their presence, Yusuke begins to sense that something is amiss. These demons have come to him to reveal one thing: that Yusuke's ancestor resides as a king of Demon World! And unless Yusuke travels to Demon World soon, the balance of power could shift and spell the end of humans reign at the top of the food chain.

It's been nearly a year since Yusuke, Hiei and Kurama arrived in Demon World, each firmly enmeshed in its tense power struggle. Now, the three former teammates are in high positions on conflicting sides, as they head towards an inevitable clash. With Raizen's time drawing to an end, Yusuke must act fast in order to keep the tenuous peace in Demon World.