[2] Sōhei Saikawa, an associate professor of architectural engineering, and Moe Nishinosono, the daughter of his mentor, travel to a remote island.

While there, the two work together to solve the murders of a prominent artificial intelligence researcher and the director of the lab located on the island.

[3][4] A manga adaptation drawn by Torao Asada was serialized in Gentosha's Comic Birz magazine in 2001.

The drama series stars Gou Ayano as Sohei Saikawa and Emi Takei as Moe Nishinosono.

An anime television series adaptation, directed by Mamoru Kanbe, written by Toshiya Ono, and produced by A-1 Pictures, premiered on Fuji TV's Noitamina programming block on October 9, 2015.