Yeong-gi Han, a talented soccer prospect teenager, loses all hope when he gets into an accident and hurts his left hand. He receives a prosthetic hand through a clinical trial and soon after, has constant nightmares of machines coming to life and destroying its surroundings. In the midst of confusion, he is chased by mysterious people and as he runs for his life, a girl he's never met saves him and acts as if she knows him well. Who is she and why is he being chased? What is happening to his surroundings? (Source: Webtoon Entertainment)