Eden of the East follows Japan in the aftermath of "Careless Monday," the missile attack on November 22, 2010 that inexplicably left no casualties and was quickly pushed aside by the public. Three months later, during her graduation trip to America, Saki Morimi meets the eccentric Akira Takizawa, a cheerful young man who is completely naked, suffering from amnesia, and convinced that he may be a terrorist. His only clue to his identity is a strange cell phone loaded with 8.2 billion yen in digital cash.
What begins as an act of kindness soon pulls Saki into a dangerous conspiracy. As she grows closer to Takizawa, she discovers that his phone is tied to a deadly game involving money, other people carrying similar devices, and a possible plan to save the world. Meanwhile, Takizawa races to recover the memories that slipped away from him, only to uncover hints that connect him to the event months earlier. In Eden of the East, Saki's search for the truth and Takizawa's struggle to define himself unfold against a mystery that could determine the future of Japan and everyone caught in the conflict.