As the front man of a deadly survival game, it is In-ho's job to make sure the plan goes accordingly, and to do so, he must portray as an ordinary player in the game, but there seems to be a distraction along the way as he encounters a former champion, Seong Gi-Hun. He didn't seem to care at first; he just had to do his job. However, he slowly starts to develop feelings, which interfere with his mission. Will he stick to the plan or follow his heart?