In a sprawling, neon-lit metropolis reminiscent of Seoul in 2180, society is structured around an advanced system called the "Sin Code," which analyzes individuals' emotions, thoughts, and potential through a biometric wrist device. Developed by a powerful technology conglomerate, the Sin Code determines one's social standing-those categorized as "Divine" enjoy privileges, while the "Cursed" are shunned and subjected to severe regulation.