Oz. Leo. Inescapable tragedy assaults and binds the two. He is no more. That simple truth tears their hearts apart like castles of sand caving in . . . But will history repeat itself when, in the midst of their sorrow, the two are pitted against each other in a struggle that could end in catastrophe?

The incuse on Oz Vessalius's chest ticks onward, but the young heir to one of the four great dukedoms directs his gaze back, seeking the facts behind a centuries-old tragedy. Intent on examining the ruins of Sablier despite warnings to scare him away, Oz and his makeshift party of explorers wander through the remnants of the former capital in search of clues to shed light upon the consuming darkness of the past. But in the yawning void where the opulent city once stood, will Oz come face-to-face with the truth? Or will he find misery the only resident...?

The air of celebration surrounding fifteen-year-old Oz Vessalius's coming-of-age ceremony quickly turns to horror when he is condemned for a sin about which he knows nothing. He is thrown into an eternal, inescapable prison known as the Abyss from which there is no escape. There, he meets a young girl named Alice, who is not what she seems. Now that the relentless cogs of fate have begun to turn, do they lead only to crushing despair for Oz, or is there some shred of hope for him to grasp on to?

"The answer you seek lies within them." Oz Vessalius may have survived his stint in the Abyss, but he is no closer to discovering the truth behind the "sin" for which he was condemned. On the advice of a mysterious man who appeared to him when Alice regained the first of her memories, Oz, along with Alice and Pandora's Raven, embarks on a mission to investigate the site of his disastrous coming-of-age ceremony in search of answers. However, what begins as a simple investigation becomes the revelation of a harsher reality, which comes swooping down on Oz as the hands of the clock continue ticking away mercilessly...

Just when it seems the tragedy of Sablier is on the verge of recurring at Isla Yura's residence, the sinister blade of the Headhunter swings once more. From the darkness where the mysteries of Fianna's House and Humpty Dumpty converge, one truth will come to light: an unmoving reality that is itself so shocking, it seems like an illusion...Will Oz and his allies ever recover?

The earnest emotions of one man cross the divides of space and time, laying bare his life, which was long hidden in the depths of memory. But when these revelations come to pass, the reality Oz has known begins to change and shift into something wholly bewildering. Could the desire in one man's heart have been the very darkness gnawing at everything all along...?

Having returned from the infernal Abyss only to find his whole world changed, young "sinner" Oz Vessalius embarks on an attempt at normalcy after being reunited with his best friend and valet, Gilbert, whom he had presumed dead. But during a trip into town with Gil and Alice, an unexpected encounter leads Oz down memory lane...For Oz, however, the path is one covered with the most menacing of thorns. And lying in wait to assail him there...The baleful eye of his father and the echoes of cursed words Oz would much rather forget...