Yeo Jang-Boo (Cha Tae-Hyun) possesses extraordinary visual acuity. He is able to see things ordinary people cannot. When he little, people laughed at him. Afterwards, he spent the next 20 years at home watching TV dramas.
Finally, Yeo Jang-Boo goes out into the world and becomes an ace at a South Korean CCTV control center.