Kurama came back from the Reikai and informed Yusuke that Koenma knows who the enemy is. Yusuke started yelling and Koenma revealed it was his former Spirit Detective, Shinobu Sensui. Koenma came down to the Ningenkai. After Koenma finished explaining why he picked Yusuke after Sensui's fall, Kurama and Yusuke felt someone behind them. It was Sensui and Sniper. Sniper fired five dice into the room, Seaman, a.k.a. Mitari, was. Kuwabara saved him again.
"Man I wish I could hear what stupid bedazzled forehead was saying," Yusuke said when he saw Sensui conversing with Sniper.
"He's saying they let Seaman go so they could follow him to us," Kurama said.
"No kidding. You can hear him all the way up there?" Yusuke asked.
"Not exactly," Kurama said.
"We are lip reading. You should try it sometime," Genkai said. Angered by their attempt on their comrades life, Kuwabara ran outside, Yusuke following him.
"It's called a Jiganto or dimension sword," Sensui said to Sniper, referring to the power Kuwabara used to break through Seaman's territory. "It cuts through physical space-time i.e. territories. That also includes the Kekkai Barrier. Keep Kuwabara alive at all costs. Use your judgment in killing the others."
Sniper nodded. On the ground Yusuke and Kuwabara faced Sensui and Sniper.
"Well that was fast," Yusuke muttered. Sensui held up two fingers. "Peace and love?"
"No it's a v for victory," Kuwabara said.
"Simple-minded boys. 2 days until the tunnels complete," Sensui said. Yusuke's eyes widened. "What's the matter, detective Yusuke Urameshi? Did you think you had more time?"
"A little bird from the Reikai said we had a full week," Yusuke said.
"Come now, we both know not to trust their intelligence," Sensui said. "We made some leaps this morning."
Kurama, Genkai, and Koenma joined Yusuke and Kuwabara. Keiko ran onto the scene unaware of the impending battle.
"What is this, Yusuke?" Keiko asked.
"Get back against the wall now," Yusuke muttered. She nodded, complying.
"Okay, I'm taking this one," Kuwabara said.
"Don't be a moron. You'll play it like I tell you," Yusuke said.
"Beating Seaman was a feat, but you're injured and in no shape to fight," Kurama said.
"Keep your distance Yusuke, It's no cakewalk for you either," Koenma warned. "I started him off too. He can store his energy and fired it just like you."
"So him and Urameshi have the same technique?" Kuwabara asked.
"How strong is his power?" Genkai asked.
"Can't say," Koenma replied. "We don't know what he's learned in the last ten years."
"Then any initial contact will be a gamble," Kurama said.
"Before you try, I have something to give you," Sensui said. He tossed something at Yusuke. Yusuke caught it and let the necklace dangle from his hand.
"Sorry, I don't swing that way," Yusuke said. Kurama grabbed the pendant, eyes glaring at the two men.
"What have you done with her?" Kurama asked.
"You'll find out soon enough," Sensui said.
"What's with the necklace?" Kuwabara asked.
Kurama tucked it into his pocket, still glaring at Sensui. "It belongs to Hisaki," he said. This made the others do a double take. "Now we know why the tunnel's growing faster now. They're feeding her energy into it."
Yusuke started advancing on Sensui, walking slowly. Yusuke manages to catch Sensui supposedly off guard and goes to punch him, but Sensui blocked last second and kicked Yusuke. Sensui used his energy attack and blasted part of Yusuke's apartment. Kurama, Kuwabara, and Yusuke chased after Sensui, while Koenma and Genkai went back to the girls. Eventually Kuwabara was captured by Sensui and his other accomplices. Yusuke gave chase and engaged Sniper in battle. Hiei came and rescued Yusuke
Back to Hisaki à
Itsuki, Sensui's former partner, a.k.a. Gatekeeper, had drained Hisaki's energy into the tunnel. All of her energy and for an upper B-class demon that's a lot. Any energy that she managed to recover went directly into stabilizing the Gate.
"Lemme go! I swear I'll kick your ass when I'm untied!" Hisaki heard Kuwabara yell. She was currently laying down in the boat in the middle of the lake. Hisaki picked herself up, peering over the edge of the boat.
"Hey, Kuwabara, they got you too?" she asked weakly.
"Whoa. Hisaki you look like you were dragged through a hedge backwards," Kuwabara said. Hisaki flopped back onto the boat.
"Not my fault," she said, breathing heavily. Just that little effort exhausted her. "Took my pendant and released my energy putting in the blasted gate. I'm so getting fired."
"Oh yeah, Kurama has your necklace," Kuwabara said. She could hardly concentrate after that. The icy plant extract was still weakening her system, lowering her body temperature. All Hisaki could focus on was saving what little energy she had and trying to keep it in her body, but to no avail. Hisaki only could pick up parts of the conversation. She did hear when an explosion echoed through the cave.
"What the heck was that? Is this a fault line?" Kuwabara asked.
"It's Game Master, must've lost," Gourmet said. "I didn't think anyone could beat him at that game."
"Never underestimate our friends," Kuwabara said. "Hey Sensui, didja hear that? My friends whipped your friends butt and now they're gonna let me out so I can whip yours."
"Gourmet, will you please shut that imbecile up?" Sensui asked Gourmet complied, gagging Kuwabara after kicking him.
"Kuwabara…" Hisaki said weakly.
"It's done. The tunnel is out of my hands now," Itsuki said. "There's nothing I can do now, nor Hisaki."
"Good job," Sensui praised. "Let's switch the two." Itsuki picked the vixen up and brought her over to the couch where Sensui was, while Gourmet took a gagged Kuwabara into the boat. Hisaki had so little energy, she couldn't even sense people around.
"Urameshi! You're late!" Kuwabara yelled muffled.
"We're coming, Kuwabara!" Yusuke yelled. "That's some welcoming party you've got in the sess pool, Sensui."
"In case you're feeling you've done this before, don't," Hiei said. "The world ahead of you is nothing like Maze Castle. They have tapped into the true depths of the Makai. Ordinary humans will shrivel up just by inhaling its rotten winds."
Sensui was watching the Chapter Black tape next to Hisaki on the couch.
"We're getting to the real grit of the film, Yusuke," Sensui said.
"Yippee," Yusuke said flatly.
"The finale's in about half an hour," Sensui said. The Chapter Black tape was showing a war scene. Hisaki looked to the screen from her curled up position, that being the only motion she could manage to do. "The most repulsive thing is they were never fighting for anything real in the first place. They were fighting out of fear of an idea that threatened their greed. It only gets crueler from here." Sensui faced behind the couch. "And then the whole thing wraps up with a rather beautiful song."
"That's oddly inappropriate," Yusuke said.
"I've always thought it symbolized hope which is why I've timed the opening of the hole to start when the music does," Sensui said.
"It doesn't make sense to me," someone said from behind the couch. "How's Mr. Itsuki standing up?"
"He's got legs, doesn't he?" Yusuke asked.
"But every time I've seen him, he's been sitting in that boat creating the tunnel," the boy said.
"The portal is alive now, it's out of my control," Itsuki said. "Even if I wished to I couldn't stop it." Some demons tried to get to Kuwabara, but Sensui destroyed them.