In a bid to combat the looming apocalypse brought about by the Abyss, four resilient survivors venture back in time to the brink of humanity's downfall. Among them, Kang Hansoo emerges as the chosen one, tasked with altering their grim fate. As the legendary powerhouse, Kang Hansoo embarks on a mission to rewrite history and rescue humanity from its impending doom. Will his heroic efforts be enough to safeguard everyone from destruction?