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.
Horrified bystanders watch as otherworldly beasts chase down and kill a man in broad daylight. Jung Jinsu declares that only sinners are sent to hell.
The New Truth offers a sizable payment to Park Jungja, a condemned woman, in exchange for the right to live-broadcast the moment her fate is decided.
Addressing a stunned world, Jinsu preaches righteousness. Detective Jin Kyunghun searches for his missing daughter. The Arrowhead targets Min Hyejin.
Bae Youngjae follows his co-worker to a fishing dock, where he witnesses a terrifying sight. The Prophet Angel appears in an unthinkable place.
A despairing Youngjae tracks down a man who he thinks might have answers. The New Truth catches wind of a mysterious organization with its own agenda.
With detrimental information hanging over its head, The New Truth scrambles to protect its power by preventing the public from learning the truth.