Even while still in middle school, Kim Dok-cha began reading a web-novel about the end of the world and its hero, who is destined to restore the world to its original state. On the day his favorite work ended, the boy became the only one who had finished reading it, and, in disappointment with the ending, wrote a letter to the author. When he receives a reply offering to rewrite the ending, suddenly the very end of the world arrives, and Kim Dok-cha turns out to be the only one who knows what to do.