Lin Shen drowned for three minutes when he was seven years old. In those three minutes, he saw "the truth of the world."
Fourteen years later, he and five other boys received a mysterious text message at the same time: "Do you want to see the truth about the world? See you tomorrow night at 23:59 in 404, the old teaching building."
They kept their appointment. The teaching building becomes an inescapable cage, the countdown begins, and puzzles follow one after another. Memories are tampered with, reality begins to collapse, and betrayers are hidden among companions.
And when Lin Shen finally reached the last level, he was horrified to discover that the ultimate reward of the game was not the truth, but himself.
"When you stare into the abyss, the abyss also stares into you. But what if - the abyss speaks first?"
