The Undefeated Newbie summary: After the apocalypse, unearthly creatures stormed the planet on Judgment Day. In present day, hunters with supernatural capabilities engage in a fierce battle against these monsters to safeguard mankind. These hunters familiarize themselves with the warfare by training in a virtual world of "Lost City." Despite not being an actual hunter, the accomplished gamer known as "Unknown" or Jinsoo Kwon, utilizes this game to cover his sister's medical expenses. The incentive of receiving medicine in exchange for his participation as a hunter in a community beckons Jinsoo. Determined to protect his loved ones and abode, he steps onto the battlefield as a legendary fighter.