After being suddenly transported to another world, Cheon Sihu spent 900 years fighting for survival. With nothing but a sword in hand, he conquered an entire world in his relentless quest to return home.

When he finally succeeds, the Earth he longed for is no longer the one he remembers. During his absence, a zombie apocalypse has devastated civilization, reducing the world to chaos.

Yet after centuries of bloodshed, Sihu has no intention of becoming a hero. If the world has ended, then so be it. He'll live however he wants, do whatever makes him happy, and enjoy the peaceful life he was denied for nine hundred years.

Armed with overwhelming power, a mysterious status window, and experience beyond human comprehension, the strongest returnee begins carving out his own happiness in the middle of the apocalypse.