"In a world devastated by a zombie apocalypse, Lee Jun-ho endured three years of pure hell, only to find himself cornered by a massive horde of the undead.

Choosing to die with dignity as a human rather than turning into a monster, he pulled the trigger of his pistol. However, at the exact split second the bullet fired, he was bitten by an 'Alpha Zombie'—one of the world's first infected.

Perhaps due to the bizarre anomaly of dying as a human at the precise moment of being bitten by an Alpha, Jun-ho unexpectedly wakes up six years in the past, long before the outbreak ever began.

Knowing that the end of the world is coming in three years, Jun-ho sets out to construct an impregnable, all-purpose shelter that can withstand any disaster. This modern apocalyptic tale follows his journey as he uses his ultimate shelter as a foothold to pioneer a true safe zone in a fallen world."