The best Takayuki Yamada’s mystery movies

Perfect Answer begins several months after the events of the first film. Kurono is still fighting aliens under the order of Gantz, a mysterious giant black orb, and he is close to reaching the score he needs to resurrect his friend Kato. Outside his night time missions, Kurono continues to live his normal life, spending time with his new girlfriend Tae. Meanwhile, young pop star Eriko is being secretly ordered by Gantz to carry out assassinations, and cop Shigeta inches closer towards finding out the truth about the Gantz missions. As the missions begin to get increasingly dangerous for both the alien fighters and the general public, Kurono discovers that the endgame for Gantz is quickly approaching.

After detective Natsumi Yukihira brings an end to the police hospital terrorist case, Natsumi is transferred to the Nishimonbetsu Police Station in Hokkaido. Meanwhile, a series of grotesque murders occurs in downtown Tokyo involving nails placed in the body of the victims. The fingerprint of Natsumi's ex-husband, freelancer journalist Kazuo Sato, is found on the the body of a victim and Kazuo is placed on the most wanted list. Soon after, Kazuo finds Natsumi and hands her a USB memory stick. The device contains information on a secret organization within the police department. Kazuo tells Natsumi that the series of murders are warnings and suspects become the next victims. Natsumi is then arrested as a suspect. Tokyo prosecutor Katsuaki Murakami appears at the Nishimonbetsu Police Station to investigate.

Teru Aoki (青木 輝) is on a train to Tokyo after a school trip. A disaster occurs which partially destroys the train and blocks a tunnel. When Teru awakes, he finds all his classmates and teachers are dead.