Kang Chul-ho, the strongest man who was summoned to another world and defeated the Demon King after a fierce battle, finally returns to Earth after 30 years.
But the world he once knew has changed—Earth is now in the era of monster raids.
Exhausted from a lifetime of fighting, Kang Chul-ho no longer wishes to pick up a weapon.
Instead, he chooses to pursue his long-forgotten dream: opening a restaurant and living a quiet, peaceful life.
This is the story of his encounters with the guests who visit his diner—and the unique tales they bring with them.