Kaname Chidori is one of the most popular girls in her high school class. Unbeknownst to her, she is believed by some to have the powers of "the Whispered", making her a target of one of the world's deadliest terror organizations. In order to protect her, the anti-terror organization known as Mithril sends a hotshot young agent named Sousuke Sagara into the school to keep an eye on her. In these episodes, when a young boy suddenly turns vicious while passing through customs, Mithril must respond and determine if this is an isolated incident or something more sinister.