Lin Xiao, an ordinary college student, has an abandoned APP on his phone - it can send text to himself 24 hours ago.
But he soon discovered that he was not the only one with this ability.
The mysterious "S" tells him: There are three existences - good, bad, and the one who made it all.
Crazy physicist Chen Entropy told him: The universe is about to collapse, and only "returning to zero" can save everyone.
Zhou Qiming from the Ministry of National Security told him: The same thing happened in 1999, and your grandfather was the victim that year.
