Humanity was designated as a disruptive species of the Cosmic Ecosystem. To reduce humanity's numbers, the universe's administrators initiate a survival game.
Jin Jaehee, having returned from the final stage of the game, reaches one clear conclusion.
"Kang Shion - only he can lead us to victory in this game."
Kang Shion, a genius with an unparalleled mind. Jin Jaehee, a regressor who lost in the survival game and returned to the past.
With the regressor as his ally, Kang Shion begins to unravel the death game with unprecedented skill.