"Hidden: Hidden Identity" is a Korean tvN mini-series that aired on June 16, 2015. It is directed by Kim Jong-min, written by Kang Hyun-sung, and starred by Kim Bum, Park Sung-woong, Yoon So-yi, Lee Won-jong, etc. The drama mainly tells the story of the secret special investigation team established in the police headquarters - the 5th Investigation Division to eradicate crime.