In the aftermath of a mysterious discovery in a cavern, a diverse group—led by the fierce harpy Suntiana, the studious elf Tyrnal, and the boar-like Rothar—unearths an ancient glass wall and a chasm that descends into darkness. Suntiana, always impulsive, tosses a torch down the pit to gauge its depth, setting off a tense exchange with the cautious Tyrnal. Driven by curiosity, Tyrnal dives into old tomes to uncover clues about the structure beneath them, a vast and forgotten “skyscraper” that may hold supplies and secrets from an ancient time. He learns it might contain everything from food and water to experimental items and a central control system, stored to protect its occupants.