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In June in Jiangcheng, the bloody dusk swallowed up the chirping of cicadas and the greenery. A sudden virus dragged civilization into the abyss. Zombies were rampant and the world was a purgatory. Lin Chen, an ordinary college student, accidentally bound to the "apocalyptic sign-in system" at the desperate moment when the apocalypse broke out. By signing in every day, you can get heaven-defying rewards - space powers, lightning attacks, survival supplies... From being unarmed to controlling thunder and lightning, from surviving in the dormitory to conquering the apocalypse, Lin Chen relied on the system step by step to fight his way through the zombie tide. Dangerous check-in locations mean huge rewards, and there are shocking secrets hidden behind the unknown virus. Let's see how Lin Chen uses the system as a shield and thunder and lightning as a spear to gather his partners, resist the tide of corpses, uncover the truth of the apocalypse, and finally become an invincible existence in this collapsed world!