A world destroyed by the outbreak of a zombie plague.

Colonel Ju Kang-rim learns the truth from the King of the Underworld.

The heroes of humanity who had survived until now—

were actually immortals who had escaped death,

and they were the true cause of the catastrophe.

“I’ll kill them all. Every last one of them.”

The Undying vs. the Grim Reaper.

To kill those who cannot die,

he regressed and became a Grim Reaper.