Humanity is suddenly thrust into a brutal survival game where every participant must conquer twenty increasingly deadly rounds. Failure means death, and the only way to survive is to grow stronger, outsmart powerful enemies, and overcome impossible challenges. After experiencing defeat and death 99 times, Ryu Min is given one final chance through regression. Returning to the beginning with the memories, skills, and knowledge accumulated over his previous lives, he is determined to change his fate and clear the game once and for all. Armed with unmatched experience, Ryu Min quickly rises above every other player, defeating enemies that once seemed invincible. However, he soon discovers that strength alone is not enough. The final stage can only be completed by a team, forcing him to trust others for the first time after countless lifetimes of fighting alone. As hidden conspiracies emerge and increasingly powerful foes stand in his way, Ryu Min must use every advantage from his previous regressions to protect his allies, uncover the truth behind the deadly game, and lead humanity toward a future where everyone can survive.