Thrown into a unforgiving fantasy world filled with monsters and magic, Lee Kiyoung faces a terrifying reality: his stats are abysmal, his potential is rock bottom, and he is destined to be nothing more than cannon fodder. Just as despair sets in, his unique ability, the “Mind’s Eye,” reveals a hidden truth about a fellow survivor named Kim Hyunsung. Hyunsung isn’t just a powerful warrior; he is a “Regressor” someone who has returned from the future with all the memories and skills needed to conquer the calamities ahead.

Realizing he cannot survive on his own, Kiyoung decides to cling to this legendary hero, not as a friend, but as a parasite manipulating his host. In a brutal system where one wrong move means death, Kiyoung must use his sharp intellect and cunning deceit to steer the Regressor’s actions, effectively writing his own instruction manual for survival. With danger lurking at every turn and trust being a luxury no one can afford, the weakest man in the world begins his desperate, high-stakes game of puppetry to outlive the apocalypse.