Hundreds of cash-strapped players accept a strange invitation to compete in children's games. Inside, a tempting prize awaits with deadly high stakes. A survival game that has a whopping 45.6 billion-won prize at stake.

Misaki Amemiya is an assistant inspector for the Metropolitan Police Department's Community Safety Bureau who becomes ensnared in a trap while investigating a mysterious illegal video website called "Babylon". Soon, she's bound an...