A veteran player of a ruined game has entered the game world!

“Either die early, or live long enough to become a Ma-in.”

In a world where ‘Ma-seong,’ which mutates monsters into demonic beasts, has become a zoonotic disease.

Su-hyeon enters an academy that trains a special force called ‘Extermination Squad,’ created to fight hunters who were once heroes but have now fallen to become Ma-in.

Can he counter the conspiracies of the Ma-in, defeat the true mastermind, and successfully achieve the clear he’s been wishing for?