Preparing for the hand-to-hand battle of his life and the title of Champion Star Runner, a headstrong fighter creates a deadly hybrid mix of Thai kickboxing and Chinese kung fu. Get ready for the ultimate Pan-Asian mixed martial arts competition, where anything goes and lives are bought and sold.

Hellbound takes place in 2022–27 in South Korea. An otherworldly face called an angel suddenly starts to materialize to deliver prophecies called decrees that condemn certain individuals to Hell at a specific future time, either seconds or years away. Three monstrous supernatural beings called demons appear at almost the exact time to maul and incinerate the person's body in a spectacular show of force called a demonstration. Two organizations in cahoots, the cult-like New Truth Society and the gang-like Arrowhead group, gain power by playing on people's fears.