In the apocalyptic ruins after World War III, the consciousness of surviving humans was imprisoned in the virtual world "Chronos-7". As the selected experimental subject, Cheng Yi has the ability to "rewind", but gradually discovers that his memory has been tampered with. In order to prevent the "Council" from controlling all mankind through the "Unearned System", he must collect twelve authority chips and activate the "Return to Zero Chip" before the simulated world collapses. But when he broke into the secret laboratory, he discovered that the backhand left by his mother Lin Wan, the chief researcher of Time Series Technology, pointed to a larger conspiracy...
