Chihiro sends Fumiaki out in search of a student, Kozue Naruse, and Maya, both of whom have seemingly disappeared.
While searching town, he encounters Mikaze, who is helping a group of concerned citizens locate the two missing people. Despite his reservations, they set off in Mikaze's car, searching the countryside. When Chihiro thinks he see something, they stop and investigate an ancient shrine that is rumored to be a buried pyramid. Inside, they discover a secret passageway that leads deep underground.
While searching the caverns beneath the shrine, Chihiro becomes frightened and runs off, leaving Mikaze behind. He encounters Maya, who is searching the caverns to find a tengu that has been menacing the surrounding town.
While they are searching and discussing the origins of the monster and the caverns, they discover a huge cave that contains what Maya calls the World Tree, the tree at the center of the world. She thinks it might be Nostradamus' Key, but Chihiro's cell phone shows that it is not. Shortly thereafter, Chihiru finds the cell phone that belonged to the agent sent back in time before him, suggesting that he had been eaten.
Suddenly, they are attacked by several moth-like tengu. During their escape, Chihiro confess that he does not have psychic powers and that he was sent back in time against his will. They also discover Kozue, who had been encased in a cacoon by the tengu.
The three eventually escape, with the help of Smile and JK, who have been tracking them by dowsing.