The world has changed, and so have the people. December 31, 2016, the day before the New Year. Kim Taehoon casually shopped for groceries from a large store. But then, a monster suddenly appeared out of thin air. With his highly trained skills that he acquired from his previous job, he started hunting monsters and managed to win, saving many people who were also in the mall. But there are more, and they don’t stop coming. Will he be able to endure to the end? Could he possibly defeat the countless number of monsters that only seemed to be getting stronger? And was it just the monsters he had to worry about? This is the story of Kim Tae-Hoon, one of the first hunters to rise in the era when monsters first appeared.