On the night of his eighteenth birthday, high school sophomore Chen Yi receives no birthday wishes from his family. Instead, he hears twelve deep, somber chimes.
After the bells ring, the world fades and crumbles before his eyes.
He falls into an abandoned school, a dungeon in a bizarre game. He and fifteen other trapped people must find the key to the principal's office within three hours if they want to get out alive.
But what is that drenched schoolgirl who hunts by sound?
And why do the ashen-black crystals that fall from the dead let him see a blood-soaked past?
As his companions blindly follow a veteran into a pointless death, Chen Yi chooses to trust what he observes: the monsters here follow patterns, and the rules can be solved.
What he doesn't know is that the real nightmare begins the moment midnight strikes...
