Yuki's cell phone diary fills with events that start to come true as his day goes on, thanks to his friend Deus, who reveals himself to be the god of time and space; a model student with a similar diary learns that someone intends to murder Yuki.

After surviving the first assassination attempt, Yuki and Yuno put their diaries together to stop a student who booby-traps the school hallways with motion-activated bombs; Kurusu, a police officer holding a diary of his own, comes to their aid.

Yukiteru opened a door he REALLY shouldn't have at Yuno's place. Now scared beyond belief, he accompanies Yuno and Kurusu to the headquarters of a local cult, where Minene is said to be being held prisoner. But she's not the only diary keeper there.

The Twelfth's assault on Tsubaki continues, with Yukiteru caught in the crossfire. As the truth behind the cult is revealed, who's side is the Sixth really on? Who is Yukiteru supposed to trust? And what does Kurusu really want with Minene?