Lady Isabella Thorne, a renowned collector of arcane curiosities, approaches the adventurers with an enticing proposition: retrieve the legendary "Elixir of Luminance" from Armstrong Manor, a decrepit estate perched on a lonely mountainside in southern Osysia, shrouded by dense tropical jungle. The elixir, rumored to grant its user control over light and shadow—and possibly immortality itself—is believed to be hidden within the manor's labyrinthine halls, secured behind intricate mechanical traps and alchemical wards devised by its eccentric owner, Lord Bartholomew Armstrong. Lady Isabella's generous reward is tempting, but her insistence that the adventurers "acquire the elixir at any cost" carries an unsettling undertone that suggests she knows more about the manor's dark secrets than she's willing to share.

Upon reaching the remote estate and infiltrating the manor, the adventurers discover a nightmare of twisted innovation—clockwork automatons patrol dusty corridors, bizarre experiments grow in abandoned laboratories, and arcane symbols pulse with malevolent energy. As they delve deeper, journals and records reveal Lord Bartholomew's descent into obsession: his desperate search for immortality led him to summon an ancient entity that now dwells within the manor's foundations, whispering constantly in his ears. Now the adventurers must navigate this house of horrors to locate the elixir while evading the manor's mechanical guardians and supernatural threats. But the true challenge comes when they discover Lord Bartholomew himself—still very much alive and continuing his work—and must decide whether to fulfill their contract with Lady Isabella, help the lord complete his dark research, or destroy the elixir and the terrible power it contains, potentially unleashing the wrath of both their employer and the entity that haunts the manor.