Kiyotaka Narumi, a world-class detective, has been missing for two years. His last words prior to his mysterious disappearance were “I’m going to uncover the mystery of the Blade Children.” These words have haunted Kiyotaka’s younger brother Ayumu ever since, but neither he nor anyone else has gotten any closer to figuring out their meaning. But after Ayumu becomes the prime suspect in a murder, he begins to discover people with links to the ‘Blade Children’ all around him! Following in his brother’s footsteps, Ayumu now must begin his own investigation into the mysterious Blade Children…