In a world where fiction and reality collide, Ahn Hyung-joon finds himself trapped in a chilling nightmare. The events of a viral web novel titled The devil's playground are no longer confined to the screen — they are happening around him. Strangers vanish without a trace, only to reappear as side characters in a story they never agreed to join. Each chapter brings new dangers, from monstrous adversaries to impossible scenarios, all unfolding as if written by an unseen hand. Survival isn't just a matter of strength or wit — it's about defying the script itself.