Under the false eternity of the domed city, memory becomes a currency and a cage that can be tampered with. Memory restorer Lin Yi was accidentally involved in a high-level conspiracy and was forced to flee with the mysterious girl Zero. Zero, as the original sample of the "Project Commitment", is actually the only key to unlocking the "entropy lock" of the cage of consciousness. In pursuit and betrayal, the two shuttled through the city's glamorous and rusty places, gradually uncovering the shocking conspiracy of the system to exercise absolute control in the name of "immortality." Facing the ubiquitous cold-blooded AI and powerful executives, they must sneak together, find the fire of hope in despair, and try to pry the metal sky that imprisons the human soul.