The year is 20XX. Nanao, an outcast with a paranormal talent, lives on a remote island training with others like him to fight against the enemies of humanity. Nana, a bubbly transfer student, befriends him and encourages him to become their leader...

Nana's secret is in danger of being exposed when a boy in her class is revealed to have the ability to travel into the past and rewrite history.

Nana befriends Kyoya, the other transfer student at the school, in an attempt to discover his talent before he finds out what really happened to Nanao.

Nana's mission comes to a standstill when Kyoya starts to spy on her. When she discovers Michiru has healing abilities, she hatches a plan to use Michiru's talent to regain the upper hand.

Between Nana's whereabouts during the mysterious murders, her suspicious behavior, and now the pile of dead bodies in the forest, Nana's classmates are starting to suspect her. She devises a scheme to cover her tracks using the pair of gyaru bullies.

Kyoya seems to be temporarily out of Nana's hair. But a betrayal by one classmate and the revelation of a new Talented on the island quickly turn the tables on her. What happened on the island before Nana was sent there?

Jin interrogates Nana, trying to learn more about her and the organization that sent her to the island. During these talks, the door to Nana's soul cracks open and she starts to remember things she would rather forget.

For the first time, Nana and Kyoya work together to try to solve the most recent murder. But Nana has her own mystery to worry about when Michiru starts acting noticeably strange.

Kyoya wants Nana to help him unmask the killer. A part of Nana wants to let the killer do her work for her, but when Michiru gets a mysterious summons, Nana has to choose between her mission and Michiru.