A beautiful private detective, formerly an FBI agent, awakens to find herself in a creepy, narrow underground cell. In the darkness, a chain is wrapped tightly around her neck. The key to escape dangles right before her eyes—but reaching it demands unbearable, excruciating pain. No matter how hard she runs, extreme traps rigged within her own body activate one after another. A masked killer emerges, slashing her young, vulnerable body and tormenting her mind. To remove the death mask clamped onto her face, she must face the ultimate trial. Screaming, "I'll definitely expose the murderer who did this to me!", she is dragged into a game beyond human limits. Her beautiful body is torn apart, her mind tortured—every agonizing moment captured in vivid detail.