One day, a beautiful woman named Aki dies mysteriously. Sakura appears in front of popular novel writer Mizorogi and introduces herself as Aki’s twin sister. In fact, Mizorogi stole Aki’s novel "Utsubora." Sakura, who has Aki’s original manuscript of "Utsubora," makes some suggestions to Mizorogi. The plagiarism of the novel soon drives Mizorogi into darkness. Meanwhile, detectives chase after the truth in Aki’s death.