It's 4 AM. The KTX train no. 101, heading from Seoul to Busan, is about to depart soon. However, after the train leaves Seoul, very mysterious stuff happens. People turn into creatures, creatures who are not human, and not animals too, after being bitten by the creatures. What will happen to everyone in the train? Read this story to find out or you can also watch the movie based on this story (Train To Busan). The storyline in the movie and this story is the same. Anyways, let's get to the story... (By the way, my ocs are not in this story.) Credits to the original movie.