In 2077, an era when neural interconnection technology was popularized, Lu Xiaoxing, a senior high school student, discovered after a car accident that there was a neon retro game arcade deep in his consciousness - the joystick extended from his temples, and his pupils reflected the flame effects of "The King of Fighters". Clearing "Whack-A-Mole" can strengthen dynamic vision, but failure will cause confusion in the real world. This intracranial space, known as "Player 9"'s exclusive space, hides secrets more dangerous than arcade games:
When transfer student Lin Ye's "Silent Hill" health bar pops up on his retina, when the corridor of the teaching building mutates into the battlefield of "Dino Combat", when the coin with "NO.9" Engraved on it and the shadow of the triangular head of "Silent Hill" appear at the same time, Lu Xiaoxing finally understands: This is not an illusion, but a "civilization filter" cast by an alien civilization.
With his left hand controlling the "Interstellar Navigation Simulator" in the game arcade, and his right hand fighting against the "Star Eater" predators in reality, he must exchange game currency for the chance of human survival in a two-line game between virtuality and reality - but the price may be the complete loss of emotions and memories as a "human".
"Welcome to the game arcade, Player No. 9. Every machine here is connected to the future of mankind."
The ultimate game that uses neurons as handles and the survival of civilization as a bet begins now.