Kekkaishi

Tokiko returns home but soon leaves for the Black Pampas Grass once again. Yoshimori secretly follows Tokiko in order to avenge Gen but is quickly discovered and rebuffed, as she believes he still needs to learn how to use his powers properly.

To develop a more effective use of his powers, Yoshimori begins his training with a group of rambunctious crows living at a woodland temple. Using the advice given to him by Tokine and the temple monk, he finally perfects his method of making precise consecutive Kekkai attacks... but as he does, he finds himself surrounded by a mysterious group!

In order to defend Karasumori from the Kokuboro, the members of the Night Troops, led by Masamori, move into the Sumimura residence. Yoshimori meets with Atora to apologize for what happened to Gen, but...

Sen and his friends from the Night Troops decide to test Yoshimori's skill in a skirmish. Meanwhile, Tokine worries about the battles to come, as the Kokuboro attacks Karasumori once again.

While Masamori and his Night Troops mount a defense against the second coming of the Kokuboro, Yoshimori allows himself to be captured by Shion to be led back to Kaguro. Amidst the chaos, Tokine follows him, not knowing that Sen was captured as well.

Back at the Kokuboro, Yoshimori is threatened with the life of Sen unless he follows Byaku's orders, but he still refuses. As Yoshimori is slowly being tortured in order to bend his will to do the Kokuboro's bidding, Matsudo appears.

For the time being, Yoshimori chooses to rescue Sen rather than battle Kaguro. As he searches for Sen, he unknowingly meets with the Princess, who bestows upon him the power to find his way through the castle maze. Meanwhile, Tokine defeats Koshu, one of the Kokuboro's primary leaders.

Byaku and Matsudo's grudge begins with the death of Byaku's wife Lisa. For fifty years, Matsudo had been looking for Byaku to fulfill a promise, and with the help of Kagami, Matsudo finally defeats Byaku.

As the Kokuboro collapses, Yoshimori looks for Kaguro, only to realize that he has become separated from Sen. Sen, on the other hand, meets up with Tokine to look for Yoshimori, but...

Getting separated from Sen, Tokine runs into Aihi who does not attack her on sight. Instead, she shares her past about how long ago she enjoyed spending time with a human who was not afraid of her. Listening in on the conversation secretly and annoyed by her memories, Kaguro proceeds to attack Aihi, gravely wounding her in the process.

Tokine is finally reunited with Yoshimori in Kokuboro, but without any time to waste, Yoshimori immediately goes into battle to settle his revenge with Kaguro. During the fight, Kaguro finally reveals his past.

As the final showdown between Yoshimori and Kaguro continues, Sen enters the battle haphazardly to help Yoshimori. Sensing that Sen is in danger, Yoshimori instinctively unleashes his Zekkai. Although Kaguro is defeated, Yoshimori loses consciousness in the process, trapping both Sen and himself within his very own Zekkai. Although Masamori and the others arrive, they are left helpless. Running out of time, Tokine makes a rash decision.

Yoshimori is unconscious, and Tokine decides to jump into the Zekkai, effectively waking him up from his trance. With the help of Tokiko's power, Yoshimori and the others escape from the crumbling world of the Black Pampas Grass. At last, the Night Troops' mission has finally come to an end, and life at Karasumori returns to normal.