In a world akin to a fractured toy chest lies the enigmatic Abyss, a fearsome domain inhabited by monstrous beings known as Chains. To most, it's a mere bedtime story spun to discipline unruly children. Enter Oz Vessalius, the vibrant and playful scion of the esteemed Vessalius lineage, oblivious to the Abyss's existence until the fateful occasion of his adulthood ceremony. Here, the elusive Baskerville Clan materializes, unjustly casting him into the Abyss for a sin he never committed, let alone comprehends. Teaming up with Alice, a peculiar Chain capable of assuming human guise, Oz endeavors to flee this nightmarish realm. As he grapples with untangling the enigmas shrouding his alleged transgression, the Abyss's secrets, and a century-old tragedy, Oz and his cohorts clash with the malevolent Baskervilles and specters of yesteryears. Amidst his odyssey homeward, unyielding despair shadows his every step.