Twin brothers Woo-sin and Soo-hyun lose their father in a murder case. Twenty-two years later, the brothers seek to clear their father’s name.

During a perilous 24-hour mission on the moon, space explorers try to retrieve samples from an abandoned research facility steeped in classified secrets.

Hundreds of cash-strapped players accept a strange invitation to compete in children’s games. Inside, a tempting prize awaits — with deadly high stakes.